shorten

The days have begun to shorten. [=last for a smaller amount of time]白天已开始变短。

shorten a pair of pants裁短一条长裤

He had to shorten the speech.他不得不缩短演讲的时间。

Not changing the oil regularly will shorten the life of the engine. [=will cause the engine to fail sooner]不定期更换机油会缩短发动机的寿命。

“Franklin D. Roosevelt” is often shortened to “FDR.”*Franklin D.Roosevelt常缩写为FDR。