v.急行,加速( speed的过去式和过去分词 );超速行驶;快速运送;加速,促进;
例句:
They have speeded up the train service.
他们业已增加火车班次.
And the tempo of the sea speeded up.
同时大海的起伏动荡加剧了.
The train soon speeded up.
火车不久就加速前进.