defer、delay和postpone的区别？

defer、delay和postpone的区别？

(1)defer指「推迟」，一般属于主动或有计划的行为，例如：

He decided to defer his departure for a week.

他決定推迟一星期启程。
(2)delay本意指「暂时阻挡」，但常引伸为「耽搁」或「拖延」，例如：

The train has been delayed by an accident.
火车因意外而延误。
(3)postpone指「延期」，一般会说明更改的日期，或加上其他修饰词语，例如：

The meeting has been [is] postponed until [to] Friday.

会议押后至星期五举行。
The party is postponed temporarily.
派对临时延期。
(4)顺便介绍put off，大致等同postpone，但比较浅白，例如：

By such artificial means, they may put off the crash of stock market, but they can't avert it altogether.