The hard shell on a beetle is an outside protection, as is the "skin", called cuticle, of an earthworm.
甲壳虫身上的硬壳是外表保护层,就像蚯蚓的“皮肤”,它叫角质层。
When genetic characterization of the contents of beetle guts gave some unexpected results, the researchers decided to take a closer look at earthworm DNA.
当甲虫内脏内容物的遗传特性显示出一些意想不到的结果时,研究人员决定进一步研究蚯蚓的 DNA 。
The anatomy of an earthworm is much simpler than that of a man.