optical illusion
1402 |
• optical
"_lusion /?ow/7 something that tricks your, eyes and makes you
think that you can see sth that is not there, or makes you see sth as different
from what it really is 视错觉；错视；视觉幻象一picture on previous page
Op-ti-cian /Dp'tijn; NAmE a:p-/ noun 1 (alsooph- ,thalmic
op’tician) (both Br£) (also op.tom.etrist AM/r/£， a person whose job is to examine people’s eyes and to recommend and sell
glasses 眼镜商；验光师2〇卩^- ctanys
{pi. op-ti-cians)
the shop/store where
an optician works 眼镜商店：to go to the optician’s 去配眼镜 3 a person who makes lenses,
glasses, etc.光学仪器制造者
op<tic$ /'Dptiks; NAmE 'a:p-/ noun [U] the scientific study of sight and light 光学一see also fibre optics op-ti-knal /'optimal; NAmE'anp-/ adj. = optimum(I) op-ti-mism
/'Dptimizam; NAmE 'a:p-/ noun [U] ~ (about/ for sth) a feeling that good things will happen and
that sth will be successful; the tendency to have this feeling 乐观；乐观主义：optimism abouc^for the future 对未来 的乐观◊ We may now Zoofc /onvard wft/i
optimism. 我们现在可以乐观地展望未来。◊ a mood 〇/cautious
optimism 谨慎乐观的心情◊ 77iere are very rea〖 grounds /or optimism, b确有由 以乐观。Fnn pessimism op-ti-mist /'Dptimist; NAmE 'a:p-/ noun a person who always expects good things to happen or things to be
successful 乐观的人；乐天派 EH3 pessimist op-ti-mis-tic /.Dpti'mistik; NAmE ,a:p-/ adj. ^ (about sth)
| ~ (that
...) expecting good things
to happen or sth to be successful; sliowing this feeling 乐观的；抱乐观看法
的 positive ： She7s not very optimistic about the outcome 〇/t/ze taifcs.她对会谈的结果不太乐观。oTh^y are cautiously optimistic that the
reforms will take place. 他们对兔否釦行改革表示审慎的余观。◊ V/e are now taking a more optimistic vfew.我们现在.抱较乐观的看
，法。in an optimistic mood ■以古▲如情绪◊ J
t/u’nfc you’re_ being a ZittZe over-optimistic.我看你是有点过于
乐观了。BCQ pessimistic ► op.ti-mis.tic.al.ly /-kli/ op-ti-mize {BrE also -ise) /'Dptimaiz; NAmE 'a:p-/ verb [VN] to make sth as good as it can be; to use
sth in the best possible way 使最优化,；■充分利用：to optimize the use resources 壳分甬资源
op-ti-mum /'uptimam; NAmE 'a:p-/ adj. [only before noun] 1 (also op ti mal) the best possible; producing the best
possible results 盖佳的；最适宜的：optimum
growth 最 锋增长◊.
the optimum use 〇/resources对资㉖的充分利M ◊ the opt/mum condi'tio/is/or ej^ective Earning 保证_习 效果的最隹条件 2 the optimum /7〇im [sing.] the best possible result，set of
conditions, etc.最佳结果；最好的
条件 BBEJ ideal
〇p-ti〇n 〇^r /'Dpjn; /VAmE'a:p-/ noun 1 [Q U] ~ (of doing sth) | ~ (to do sth) something that you can choose to have or do; the freedom to choose what
you do可选择的事物；选择；选择权；选择的自
由：也 J see ft, we have two options ...据我看，我们有
两种选择…◊
rhere are various options open to you•你 有多# 选择。◊ Going to 'coHege was not an option /or
me.上大_:示是我可以选择的道路。oJhadnooption but to (= I had to) asfc him to Zeave.我别无选择，只 有请他离开。◊ Students have the option 〇/
studying abroad in thdr second year.学生专二♦级时奇以辱择出 国学习。◊ A savings that gives you the option to
va/y your mcmtWy payments.二项允许你每月自去存款的
储倉方案。◊ particular modeZ comes wit/i a wide range of options (= things you can choose to have when buying sth but which you will have
to pay extra for). 这一种型号的货品有很多选择。2 [C] a subject that a student can choose to
study, but that they do not have to do 选修课：77ie
course oj^ers options in design and computing.这一学程开了设计和计算机技术的选修科目。
3 [C]〜（ojj sth) | 〜（to do sth) the right to buy or sell sth at some time in the
future (未来的 r实卖达择权：We have an option on the house.我权㉟买焱命房子。◊ The property is
for rent with an option to buy at any time.这房子供出租，但可随时。褎He has promised me first option on
his car (= the opportunity to
buy it before anyone else).他答应我可以优先买他的汽车。◊
share
options (= the right to buy shares in a company) 认股选择权
4 [C]
(cowpwf/Vig 计）one of
the choices you can make when using a computer program 选项；选 择：Choose
the ‘Cut’ option yh?m the £dft menu.从编辑 选单上选“剪切”项。'
IT»TWI keep/leave your 'options open to avoid making a decision now so that you
still have a choice in the future 坪闰选择余地；暂不定
the .soft/,easy 'option (often disapproving) a choice which is
thought to be easier because it involves less effort, difficulty, etc.轻松的选择；捷径：They
are anxious that the new course should not be seen as a soft option,
盼望新办法不会被视为捷径。◊ He dea'ded to tafce the easy
option and give them what they wanted,
水-舟，他们f什么就给什么。 op-tion-al /'DpJTanl; NAmE 'a:p-/ adj. that you can
choose to do or have if you want to 可选#的；遙修的：Certain courses are compulsory,
others are optional. ^ ^ ®
是必修的，其他是选修的。◊
This modeZ comes with a number of optional extras (= things you
can choose to have but which you will have to pay extra for).这一型 号有一系列可供选择的附件，价格另计。
op.tom.etrist
/Dp'tDmatrist; NAmE a:p'ta:m-/ noun =optician(I)
op-tom-etry
/Dp'tDmetri; NAmE a:p'ta:m-/
noun [U] the job of
measuring how well people can see and checking their eyes for disease 验光；视测定
'opt-out /iow/7
(often used as an adjective 常用作形容词） 1 (in
Britain) the action of a school or hospital that decides to manage its own
money and is therefore no longer controlled by a local authority or similar organization (英国学校、医院从地方当局财政管辖的）
退出，脱离 2 the act of choosing not to be involved in an agreement不参与协议的决定：an
opt-out dause退 出的条款◊
MPs hoped to reverse Britain’s opt-out 介om the treaty•国会议员希望推翻英国退出该条约的决定。
opu-lent /'Dpjalent; NAmE 'arp-/ adj. (formal) 1 made or decorated using expensive materials 豪华的；富丽堂皇
的；华丽的 H771 luxurious 2 (of people 人）extremely rich 极富有的；阔气的
BCd wealthy ► opu.lence /-Ians/ noun [U] opu-lent-ly adv. opus /'0up9S； NAmE 'ou-/ noun
{pi. opera /'Dpara; NAmE 'a:p-/) [usually sing.] 1 {abbr. op.) a piece
of music written by a famous composer
and usually followed by a number that shows when it was written (按个别作曲
家的创作排列的）编号乐曲，作品编号：Beethoven’s
28贝'多芬第十八号作品2 (/bmw/) an
important piece of literature, etc., especially one that is on a large scale主婁(:文学等〉作品；（尤指 >名作，巨著H23 work — see also magnum opus 〇r
CH* /o:(r)/ conj.
1
useci to
introduce another possibility (用以引出另一 种可能性）或，或者，还i :乜your sister oWer or younger t/ian you ?你的姐妹比你大还是小？
◊ Are you comfng or not?你莱迷是木朵？ ◊ Js i.t a
boy or a girt?是 个男孩还是女孩？
Oft can be Wade, wMte or grey•它可 能i黑的、_的或灰的。一compare either
adv.⑶
2
used in
negative sentences when mentioning two or more things (用于否定句，提出两种或多种事物时）也
不：He can’t read or write•他不会读，，禾会驾。◊
There are people without homes, jobs or family.
屋，又羌J：作，又无家庭。一comparetJEiTHERfl小/.⑵
3
(also or else) used to
warn or advise sb that sth bad .could'happen; otherwise (用于警告或忠告）否则，木
然：Turn t/ie heat
down or ftW burn.地炉外开小一些， .不然就烧焦了。4 used
between two numbers to show approximately how many (用于两个数字之向表示约略
被目.）大约：There
were sir or seven 〇/ U5 there.我们约 W 六4：个人在场。5 used
to introduce a word or phrase that explains or means the same as another i(用 于引出解释性词语）或者说：geotogy，or the science
oj" the earth’s crust地质学，或者说地壳的科学◊
ft vveig/w a fcito, or just over two pounds.逢东西重一公斤，或者说
两舍多一点儿。6 used to say why sth must be true (用于说明原因）不然，否则：He must
〖ifce
her, or he wouWn’t keep caWng her•他定喜欢她，•不然他不，老 给她打电话。7 used to introduce a contrasting idea (用¥引虫知■比的概念）：He was lying—or was he? 他在说谎，达是没有说谎？ or so about大约：