例句：

　　The speed limit on the freeway is 55mph.

　　這條高速公路的限速為每小時(shí)55英里。

　　He slewed the motorbike over as they hit the freeway.

　　他們沖到高速公路時(shí)，他趕緊把摩托車調(diào)轉(zhuǎn)方向。

　　Smoke began to spread across the freeway like fog.

　　煙開(kāi)始像濃霧一樣在高速公路上蔓延。