n.胸；胸膛；胸腔

Unlike an insect, a spider has eight legs, and its head and thorax are oined. 和昆蟲不一樣，一只蜘蛛有八條腿，而且它的頭和胸是連在一起的。

The thorax is divided into three compartments. 胸腔分為三個部分。

n.氣胸

n.(=haemothorax)[醫(yī)]血胸；胸膜腔積血

血氣胸