他们匍匐前进。

They crawled along on their bellies.

战士们在稻田里匍匐前进。

The soldiers were bellying through the rice paddy.

匍匐前进时，你要协调双腿、胳膊和呼吸。

You need to coordinate legs, arms, and breathing for the front crawl.

虽然太郎失去了宝贵的四肢，但是他并没有意志消沈，而是用匍匐前进来代替奔跑跳跃，活泼乐观地过着每一个日子。

Though he’d lost his precious limbs, he was not downhearted. Unable to leap and run, he moved around by crawling, and still enjoyed every day in a lively and cheerfully manner.