感到孤独而沮丧。一related noun let-down ,let
sb/sth<- down to make sb/sth less successful than
they/it should be.(使）略逊一筹，美中不足：She speaks French
very fluently, but her pronunciation lets her down.她法语讲得很流利，但美中不足的是发音不大好。
,let sth—_ down 1 to
let or make sth .go down 放下；降 低；降下：We Zet the bucfcet down by a ro^pe. _们用绳 手把ft柄放下去。2 to make a dress, skirt, coat, etc. longer, by reducing the amount of material that is folded
over at the bottom (把衣服、裙子、夕卜套等）放
长；.放出（褶边 > take up 3 (6r£) to allow the air to escape from sth
deliberately (故意ilk ) ■放气：Some fcids had Zet my tyres
down.几个小孩子故意也我的轮胎
放了气 sb/yourself ’in for sth
involve
sb/yourself in sth that is likely to be unpleasant or difficult 使陷入；使卷入；牵涉：J voiimteerecTto help,
and then I thought (Oh no, what have I let myself in /or/’我自告奋勇要帮忙，然后又一想:“啊，不好，我干 ■吗把.自己#进i呢！心，.丨et sb on sth | ,丨et sb :_into sth (/>7/or/?7fl/) to
allow sb to share a secret 告知，.：透露 .(秘密）：Are you going to Zet them
in on your pZans? 你是不是打算让他们知道你的计划呀?.丨et
sth ’into sth to put sth into the surface of sth so that it does not
stick out from it把…置入，把…嵌进（某物的秦层）：a window
iet into a waH 嵌进墙壁的窗户、，丨et sb
’off (with， sth) to not punish sb for sth
they have done wrong, or to give them only a light punishment 不惩罚；敢过；.宽
恕；从轻处罚：77ieyZetusc#〖igMy，他们放过了我们。
◊
She was〖et oJ^vWth a warning.她被从轻处罚，.只是受
了个警告。，丨et sb _off sth (8r£) to allow sb not to do sth or. not to go somewhere 允:许.某人）,不做；准许 (某人）’木美（某处）■ : He
Zet us oj5r/iomeworfc today. 他令天免了、我们A家庭作业。，丨et sth 'off to fire a gun or make a
bpmb, etc. explode 放（.枪_ );使爆炸： 77ie boys. werd 〖etring
oj^f^rewor^s.那些'男孩在放在也。
,let ’on (*〇 sb) (/Vj/o/tw/). to
tell a secret (对某九）.说出
秘密，.泄密：I’m getting ma/rfed next
wee/g but pZease don’t ?et on to anyone.我下周就要结婚了，但这事请对谁
都不要说。◊[+ that] She on that she
was kavirtg•她 透—M 要离开。，丨et ■ out (MA/rjiE) (of school
classes， films/movies,.. meetings, etc.课堂、电影、舍议等）to come to an end, so that it is time for people to
leave ^ 束；下谋；散场；散会：77ie movie has just Zet
out.电影
刚刚散场。，丨et sb ■ out to make sb stop feeling
that they are invoived in sth or have to do sth 使某人解脱： They
think the attacker was very tall—so ph.at
lets you OUt•他们.认为歹徒是个高个子，这样就没你什么事儿了。
—related
noun let-out ,let sth 'out 1 to give a cry, etc.发出（叫.声等）:：to Zet
out a scrgam 〇/ terror 发虫 恐怖沾尖叫◊ to ietoutagasp
o/deUght高矣地喘一口气
PTUa
hold in 2 to make a shirt, coat, etc. looser or
larger (把衬衣、外套等）放大，放长，加宽EEHtake in ,let ’up 1 to
become less strong 减弱；减
轻：77ie pain 〖et
up.疼痛终于减轻了。2 to
make less effort 放松（努力）〆松劲：Wfe mustn’t Zet up now•我们现在可不能放松啊。一related noun let-up
mnoun
►
IN TENN丨S 网球 1 a serve that lands in the correct
part of the court but must
be taken again because it has touched the top of the net (发球时的）擦网球
►
HOUSE/ROOM 房辑;房 fnj
2 (阶£) an act of renting a home, etc.出租；租借：a ton公-ten〇/sh〇rt-term Zet 长 期/短期出租
ithout ,let
or 'hindrance (formal or law W) being prevented from
doing sth; freely 毫无 |k
碍；顺畅地；自由地
-let 叫所x (in nouns 构成名词）small; not very
important 小的；不很重要的：boofciet小册子opigtet猪崽◊ stariet尚未成名的年轻女演员
'let-down noun [C, usually sing., U] something that is disappointing because it
is not as good as you expected it to be令人失望的事；失望；沮丧BBCl disappointment, ANTICLIMAX
le.thal /_li:01/ flt/y. 1 causing or able to cause
death 致命 的；可致死的 deadly, fatal ： a lethal dose of poison毒药的致死剂量◊ a〖ethai
weapon致命的武器◊ (figurative)
The closure of the factory dealt a lethal
blow to
the town.那家工厂的关闭对这座城镇是-r个致命的打
击。2 (/>7/o/7r?fl〇 causing or able to cause a lot of harm
1159 letterhead
or
damage危害极大的；破坏性极大的：Ybu
and that
car—it’s a ZethaZ
combination/ 你和那辆车 真是一
对杀手！ ►丨e，tha丨•丨y /li:0ali/ fli/v. leth-argy /'Ie0ad3i; NAmE 'leQ^rd'sil noun [U]
the state of not having any energy or enthusiasm for doing things 无精打采；没有热情；冷漠BECILISTLESSNESS，INERTIA
► leth-ar-gic 7l0'0a:d3ik; NAmE -'Qaird^-/ adj. ： The weather made her 〖et/iargic•那天气使得她:i精打采。 Lethe
/’li:0i/ now/?..[U] (in ancient Greek
stories 古希腊故 事）an imaginary river whose water, when drunk, was
thought to make the dead forget their life on Earth 勒忒，忘川（假想的河流，死者饮此河的水即忘记尘世 一生）
'let-out noun [sing.] (8r£) an event,or a statement
that allows sb to avoid.having to do sth 逃脱的机会；漏洞：
Good—we have a〖et-out
runv•好! '我们现在有机可乘。◊ a
tet-out dause (= .in a contract)免责条款
let’s s/7〇/t /om?
of let
us: let’s breafc/or Zurich.咱们停 下来吃午饭吧
let-ter (Hr /'let8(r)/ noun, verb
►
noun 1 a message that is
written down or printed on paper and usually put in an envelope and sent to sb 信；函：a busfness/t/uinfc-youj
etc. tetter 商业信函、
感谢信等◊ a 〖etter o/comp〖aint
投诉书◊ (8r£) to post a Zetter 寄信◊ (AMmf) to maif a
tetter 寄奋◊ There’s a
Zetter/or you介om your mother.有你母亲的一封来信。◊ Yiou wiH be no胡ed by丨etter•将角魯函通知你。
You
will find compounds ending in letter at their place in the alphabet.以letter结尾的复合词可在各字母中适当
的位置查到。2 a written or printed sign representing a sound used in
speech 字母：is the second letter of the alphabet. *b是字母表的第二个字母。◊ Write ytfur name fn capftal/bZocfc ietters•用大:写^ 学母书:与赶‘名。
3 (NAm£) a sign in the shape of a letter that is sewn onto clothes to show that a
person plays in a school or college sports team (’缝制在运动服上沾）校运动队字母
标志’IT»171 the .letter of the 'law (often disapproving) the exact words of a law or rule
rather than its general meaning法律（或法规}的准确字面意义：They insist on sricfcing to the ietter o/the 〖aw•他们坚持严守法律的
字面意义<». to the 'letter doing/following exactly what sb/sth says, paying attention to every
detail 丝毫不■差j 不折不扣；•彘地：J/oWowed your instructions to the Zetter.我是严格遵照你的指示办的。
►
verfc 1 [usually,
passive] to give a letter to sth as part of a series or list用字母标明（_清单等上）：[VN-N] the stars lettered A(p/ia
cmg Beta 以 a 和 p 命名的星’[also VIS] 2 [VN] [usually
passive] - sth (in sth) to print, paint, sew, etc. letters onto sth 字母:印刷 _ (油缝制等）+: a black barnier
〖ettered in white命春—色字母的黑4横幅3[V] (NAmPj to receive a letter made of cloth
that you sew onto your clothes for playing in a school or college sports team领取到学校运动队布制宇母标志
'letter bomb noun a small bomb that is sent to sb hidden in a letter that explodes when
the envelope is opened书信炸弹（藏匿在书信宁，开封即爆炸r —see
also PARCEL BOMB
'letter box noun (6r£) 1 {NAmE 'mail slot) a narrow opening in a door or wall through which mail
is delivered .(.丨7]或墙上的■)'信箱 2 ’mai丨.box) a
small box near the main
door of a building or by the road, which mail is delivered to ('建筑物大门 口或路 旁的 箱 3._= postbox —compare
pillar box —picture on next page let-ter-box
/'letebDks; NAmE -tarb-/ noun, verb
►
noun [U] =
WIDESCREEN
►
verb [VN] to present a film/movie on
television with the width a lot greater than the height, and with a black band
at the top and bottom 宽银幕模式播放a ietterboxed
edition宽银幕模式的^本
'letter carrier noun [NAm£} = mail carrier let-terhead /'letahed; NAmE -tarh-/ noun the name and address of a person,
a company or an organization printed at the top of their writing paper 信头（印于信
笺上端的个人、公司或组织的名称和地址）