他们用锤子敲穿水泥块。

They used hammers to chop through the concrete chunks.

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杨利伟说道： ：“那个声音既不是来自飞船外也不是来自飞船内，但是听起来好像是某人在敲击飞船船体，就好像用木锤子敲铁桶一样。”

"It neither came from outside nor inside the spaceship, but sounded like someone is knocking the body of the spaceship just as knocking an iron bucket with a wooden hammer, " Yang said.

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