讲解：
It's hailing!
正下着冰雹！
We drove through hail and snow.
我们顶着冰雹和大雪开车。

cut through
开辟(出路或通道):
They used a machete to cut through the bush.
他们用大砍刀在灌木林中劈出了一条路。

back off
退缩,退却(以躲避可怕或讨厌的人或事物):
As the riot police approached the crowd backed off.
防暴警察靠近,人群就往后退却。

hold on (to sth / sb) | hold onto sth / sb
抓紧；不放开:
Hold on and don't let go until I say so.
握紧,等我让你松手时再松开。

speed up | speed sth up
(使)加速:
The train soon speeded up.
火车很快加速了。