减少；让……下车；睡着

chopped off───砍掉

copped off───遮掩

dropped out───退出；退学；脱离

lopped off───砍掉；缩短

popped off───n.溢放口；v.突然离去

ripped off───偷窃；扯掉；欺诈；剥削

roped off───用绳索隔开；围起来

stopped off───中途停留

topped off───结束；完成

Traffic in the town has dropped off since the bypass opened.───这条旁道通车后，城里来往的车辆就减少了。

Sales have dropped off.───销售量下降了。

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％。

Traffic has dropped off since the by-pass opened.

The fruit dropped off the tree.

The handle of the door has dropped off.

The old man has dropped off by the fire.

Your button has dropped off.

The book dropped off his hand.

He rapidly hent my clothes before I dropped off the cliff.

I must have dropped off to sleep .

The old woman dropped off in her sleep.