显然，这沉重的通道口的门不可能自己打开。

Obviously, heavy hatch-doors did not swing open unaided.

youdao

头上，通道口的门在这黑暗构成的墙上，呈一个灰色的正方形。

The hatch-door above him was a gray square in the wall of darkness.

youdao

头上，通道口的门在这黑暗构成的墙上，呈一个灰色的正方形。

The hatch-door above him was a gray square in the wall of darkness.

youdao