The heart battered like a fist against the chest wall.

心跳很剧烈，像是有只拳头在胸腔里猛捶。

youdao

Make sure you stay in bed for the upper part of the suspension anything, or not will let you create oppressive feeling thing, such as on room wall embedded chest or heavy portrait.

确定你卧床的上方没有悬挂任何东西，或是会让你产生压迫感的东西，诸如房间墙上的嵌入式衣柜或是厚重的画像。

youdao

Naturally situated against the chest wall of which they seem to be part.

当然位于胸壁的反对，他们似乎是一部分。

youdao

When the negative pressure is released, the chest wall "collapses" and one breathes out.

CNN: 'I lived in an iron lung for seven years'

That still leaves a 10% chance of developing cancer in the chest wall, armpit or even in the abdomen.

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This negative pressure causes the chest wall to expand and air is drawn into the lungs through the mouth and nose.

CNN: 'I lived in an iron lung for seven years'