ack-projection noun ^
[u] the process of shining an image onto the back of a screen 背面投影 2 [C] an image that has
been shone onto the back of a screen 背投影像 back-rest /'baekrest/ noun part of a seat that
supports sb’s back 溱背
.back
'room noun a room at the back of
a building, away from the entrance, often where secret activities take place后室；密室
back-room boys noun [pi.] (Br£) people who
do important work for a person or an organization but who are not well known
themselves 默默无闻地从事重
要工作的人；无名功臣
back-scratch-ing
/'baekskraetjir)/
noun [U] {informal, often disapproving) the fact of giving sb
help in return for help that they have given you, often in connection with sth
that might be illegal互开方便之门，互相利用
(常指从事非法活动}
,back 'seat noun a seat at the
back of a vehicle <车辆 的）后座 IT*!?；! take a back seat to allow sb else to
play a more active and important role in a particular situation than you do允许彳i人领先；甘愿居于人下；退
居幕后
.back-seat
'driver noun 1 a
passenger in a vehicle who keeps giving advice to the driver about how he or
she should drive对驾驶者指手画脚的乘客2 a person who wants to be in control of sth
that is not really their responsibility企图越权者 backsheesh = baksheesh
back.shift
/’baekjift/
/?ow/? [U] (///igw/st/cs 语言）the changing of a
tense when reporting what sb said, for example when reporting the words 'What.
an? you doing?’ as ‘He asked me what I was doing.’（转成间接
引语时的）时态后移
back-side
/'baeksaid/
noun {informal) the part of the body
that you sit on 屁股 cn7l behind,
bottom ： Get 〇Jf y〇ur
backside and do some work/ 起来干点活儿 BE!
'back
slang noun [U] {linguistics i§W) informal language
in which words are spoken as though they are spelled backwards倒拼俚语；逆读俚语
back-slap-ping
/'baekslaepiij/
noun [U] loud and enthusiastic
behaviour when people are praising each other for sth good they have done (热情的）互相祝贺，互相
打气► back.slap.ping [only before noun]: backslap-
jn'ng tributes 互如的话
backslash /'baekslaej/ noun a mark (\), used in
computer commands (计算机符号）反斜麵一compare
FORWARD SLASH
back-slid-ing /'baekslaidii]/ noun [U] the situation when
sb fails to do sth that they agreed to do and returns to their, former bad
behaviour 倒退；故态复萌 back-space /'baekspeis/ noun, verb m noun the key on the
keyboard of a computer or typewriter which allows you to
move backwards. On a computer keyboard this key also removes the last letter
that you typed.(计算机或打字机的）回格键，回退键； (计算机的）回删键
■
verb [V] to use the backspace key on a computer
keyboard or on a typewriter 回格；回退;■回删
back-spin
/'baekspin/
noun [U] a backward
spinning movement of a ball that has been hit, which makes it go less far than
it normally would (球的回旋，下旋 'back-stabbing noun [U] the action of criticizing sb when
they are not there, while pretending to be their friend at other times背后中伤；暗箭伤人
back-stage
/,baek'steid3/ adv. 1 in the part of a
theatre where the actors and artists get ready and wait to perform /g ^ ： After the show, we were allowed to go backstage to meet the cast ^^I'J
、后台和演员见面。2 away from the
attention of the public; in secret 私下；秘击地：J’dZifce to fcnow what really goes on backstage in government.
幕后究竟干些什么。► b?idostage <2办 back-stairs /'baeksteaz; NAmE-sterz/ noun, adj.
noun [pi.] stairs at the
back or side of a building, some- times used by servants后楼梯，侧楼梯（供仆人等使用）