The car followed the twists and turns of the mountain road.

汽车沿着弯弯曲曲的山路行驶。

It allows the train to maintain a constant speed through the twists and turns of existing track.

它可以让火车在现有蜿蜒盘旋的轨道上保持匀速。

The course of life never runs smoothly for it is full of ups and downs and twists and turns.

人生之路从不一帆风顺，因为它充满了起伏与曲折。

While prospects are bright, the roads have twists and turns.

前途是光明的，道路是曲折的。

Life is full of twists and turns.

生活充满坎坷。