So basically all of the abdominal contents are being sucked up through this hole where the lungs are.

所以，基本上所有的腹部内容物都通过肺所在的这个洞被吸上来。

Contraction of the abdominal muscles compresses the abdominal contents and pushes up on the diaphragm, and that further decreases the thoracic volume, increasing thoracic pressure and pushing the air out.

腹部肌肉收缩压迫腹部内容物并向上推压膈肌，从而进一步减小胸腔容积，增加胸腔压力并将空气推出。