老旧的汽车吃力地向前爬，把我们缓缓地拖上了山坡。

The old car pulled hard as we drove slowly up the hill.

《牛津词典》

乌龟以极慢的速度向前爬。

The tortoise crept along at a very slow speed.

youdao

对宝宝们来说向上爬是简单的，因为他们能看到向前爬的方向，而且他们也习惯向前爬了。

It's easier for them to climb up; they can see where are they going and they are used to crawling forward.

youdao