speed可數(shù)嗎

　　I got done for speeding on my way back.

　　我在返回的路上因超速行駛而受罰。

　　The new speed limit on this road becomes effective from 1 June.

　　這條路上新的限速規(guī)定自6月1日起生效。

　　The engine is very noisy at high speed.

　　這個發(fā)動機轉(zhuǎn)速高時噪音非常大。

　　The drill has variable speed control.

　　這鉆機有變速控制。

　　He was driving without regard to speed limits.

　　他開著車，根本不理會速度限制。