这辆卡车需要更多的牵引力才能爬上陡坡。

The truck needs more traction to climb the steep hill.

骑自行车的人必须用力蹬车才能爬上陡坡。

The cyclist had to pedal hard to get up the steep slope.

火车蜗牛一般地慢慢爬上陡坡。

The train snailed up the steep grade.