speed的用法總結

　　speed例句分享

　　He was driving at well over the speed limit.

　　他當時開車的速度遠遠超過了限制。

　　Each learner can proceed at his own speed.

　　每一位學習者都可以按自己的進度學習。

　　The train began to pick up speed.

　　火車開始加速。