英 [ˈdrɒp ɒf]
入睡：指进入睡眠状态。
减少，下降：指数量或程度变少或减小。
放下，送到：将某人或某物放在指定地点，通常指在途中顺便完成。
drop off // [ dropping dropped drops ]
→seedrop
动词词组 If you drop off to sleep, you go to sleep. 睡着
I must have dropped off to sleep.
我一定是睡着了。
动词词组 If the level of something drops off, it becomes less. 下降
Two years later, earnings from the stocks had dropped off by nearly 50%.
2年后，股票收益已下降了近50％。
a noticeable deterioration in performance or quality
同义词： slump / slack / drop-off / falloff / falling off
fall or diminish
change from a waking to a sleeping state
同义词： fall asleep / dope off / flake out / drift off / nod off / doze off / drowse off
retreat
同义词： fall back / lose / fall behind / recede
... 顺便说一句：by the way 睡着;(客人)一个个地散去;(兴趣等)减弱：drop off 睡眠;微睡：slumber ...
...s up 穿上盛装，精心打扮；装饰，修饰大学英语四级六级考试 drop by／in 顺便(或偶然)访问大学英语四级六级考试 drop off 下降，减少；睡着，入睡；让(…)下车，把…
... drop in(over)顺访；串门 drop off睡着；(客人)一个个地散去；(兴趣等)减弱 drop out辍(学)；离队出走，中途退出 ...
...心打扮；装饰，修饰大学英语四级六级考试 drop by／in 顺便(或偶然)访问大学英语四级六级考试 drop off 下降，减少；睡着，入睡；让(…)下车，把…
"Unlike world leaders," say the summit's organizers, "young people are refusing to let it drop off the plan."
“与世界领导人不同，”峰会组织者说，“年轻人拒绝把它从计划中撤下。”
Simply drop off your finished books and take those ones that other people left behind.
只要把你已经完成的书丢掉，把别人留下的书拿走就行了。
The membership of the club began to drop off.
这个俱乐部会员开始减少。
"Are there people in the world with the foolishness to die because leaves drop off a vine?
VOA : special.2009.08.01
This shows a strong seasonality and then a drop off since 2006.
这体现了房地产的季节性,06年又是一次跳水
金融市场课程节选 : 耶鲁公开课
Because it has to drop off precipitously.
因为它必须陡然减少。
固态化学导论课程节选 : 麻省理工公开课
We've seen a drop off of the amount of money that we have to spend when we are on tour."
VOA : standard.2010.02.21
For Florida,where tourism accounts for more than 20 percent of the economy, the drop off was serious.
VOA : standard.2010.05.04
Some of her grown children drop off household supplies when they see she is running short.
We see a sharp drop off around the age of 35 when people become more established.
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Even younger residents drop off-the-cuff references to figures like Paul Revere in their casual bar-room banter.