drop off
- 中途放下（某人）;睡着;打瞌睡;减退;减少;中途卸下（某物）
drop offThese words all mean to start to sleep.以上各短语均含开始睡着之义。
to start to sleep, sometimes when you do not intend to or in a situation that is not appropriate指入睡，有时指无意之中或在不适当的场合睡着：
When she finally fell asleep, she began to dream.
她终于睡着了，并开始做梦。
I pinched myself to stop myself from falling asleep.
我掐自己以防自己睡着。
to start to sleep, especially when you intend to指入睡，尤指有意想睡着：
I shut my eyes and tried to go to sleep.
我闭上了眼睛想睡。
He woke for a moment and then went to sleep again.
他醒了一会儿，然后又睡了。
to start sleeping, especially after a long time or when this is difficult指开始入睡，尤指经过很长时间或很难才睡着：
He took a long time getting to sleep that night.
他那天晚上过了好长时间才睡着。
to fall asleep, especially gradually指睡着，尤指渐渐地入睡：
I must have drifted off, because when I woke we were nearly home.
我一定是睡着了，因为我醒来时我们已快到家了。
( informal ) to fall asleep for a short time, especially when you are sitting down and when you are not supposed to be sleeping指睡着了一会儿，尤指坐着或在不该睡觉时打瞌睡：
I was practically nodding off in that meeting.
我在那次会议上差点睡着了。
( BrE informal ) to start sleeping lightly指打盹儿、小睡：
I dropped off and missed the end of the film.
我打了个盹儿，错过了影片的结尾。
verb
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1
- change from a waking to a sleeping state
- he always falls asleep during lectures
- Synonym: fall asleep dope off flake out drift off nod off doze off drowse off
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2
- fall or diminish
- The number of students in this course dropped off after the first test
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3
- get worse
- My grades are slipping
- Synonym: slip drop away fall away
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4
- retreat
- Synonym: fall back lose fall behind recede
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5
- leave or unload
- unload the cargo
- drop off the passengers at the hotel
- Synonym: drop set down put down unload discharge
数据来源：WordNet
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They too have disturbed sleep if they share a bed , but tend to get better quality rest when they do finally drop off .
当然，她们和伴侣同床时，睡眠也会受到影响，但她们一旦睡着了，身体就会得到很好的休息。
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Interest in the book began to drop off .
人们对这本书的兴趣开始减退了。
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Sales to the British forces are expected to drop off
预计对英国军队的销售量会减少。
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The recession caused sales to drop off
经济不景气使销量下降。
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Soon the flowers drop off , and the fruit takes their place .
很快，花朵凋谢，果实长了出来。
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As winter approaches , the leaves turn brown and drop off the oak-tree .
随着冬天的到来，橡树的叶子变成褐色，从树上掉落。
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Tell students when and where to drop off this form .
告诉学生上交此表的时间和地点。
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I won 't drop off my English , a good interest .
英语是我的其中一个兴趣，千万不能丢掉！
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There has been a significant drop off in Green 's efficiency .
格林的效率则有很大的下降。
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I wanted to drop off these blood and tissue samples first .
我得先把这些血样及组织样本给带来。
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I drop off and miss the end of the film .
我打了个盹儿，把影片的结尾给错过了。
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I went by your professor 's office to drop off the paper .
我经过你的教授的办公室，把你的论文放在那了。
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Is this a big drop off point ?
从车上落下那么个大家伙？
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Sales of that type of article always drop off during the winter months .
那类商品的销售量在冬季总要减少的。
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You have anything you want to drop off ?
你有什么要我带过去的吗？
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To drop off some stuff I left at home .
把我忘了带走的东西给我送去。
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' My weight literally began to drop off , ' she said .
她说道：我的体重真的开始下降，没用多久我就开始穿小一些尺寸的衣服。
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So we wake one another up if we ever do manage to drop off .
所以即使好容易能睡着一会儿，也总会被别人吵醒。
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I just wanted to drop off some food for you guys and get going .
我准备放下你们的食物然后就走。
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I 'll be sure to drop off your stuff .
我一定会把你的东西还给你的。
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Eg. at times , their communication would drop off , Mr. Jones said .
有时候他们之间的联络会减少，琼斯说。
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I just had to drop off a little something for the bride .
我只是想给新娘子带些东西来。
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She said if we drop off four cupcakes by tomorrow morning ,
她说明早给她送4个小蛋糕过去
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Every few hours , however , he would grow tired and drop off to sleep .
每隔几个小时，他也会累，于是就睡着了。
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France 's high labor costs seem to be behind the drop off in exports .
法国的劳动力成本高，似乎是出口下降背后的原因。
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You can drop off your resume in person .
你可以亲自到公司来投递简历。
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We drop off our bags and we go meet Ali at 4 o'clock
我们先回家放行李然后四点去见艾莉
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but I need to drop off his car keys at the Lost and Found before he --
但是我要赶在他回来之前把他的钥匙放在失物招领处
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Or you can come in tomorrow and drop off your badge .
否则明天你可以来把你的徽章卸掉了。
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But ... did you drop off the --
不过…你有没有去…