胸内骨...

Endothorax is composed of invaginations of the tergal, pleural and sternal regions of each thoracic segment.胸内骨是由各胸节背、侧、腹部的内陷构成....

endothorax的音标：endothorax的英式发音音标为：[endɒ'θɔ:ræks]endothorax的美式发音音标为：[endɒ'θɔræks]...