Earthworms usually appear after rain.

蚯蚓通常在雨后出现。

Earthworms are terrestrial creatures that can drill holes.

蚯蚓是能够钻洞的陆生生物。

Earthworms play an important role in the food chain.

蚯蚓在食物链中发挥着重要作用。

The anatomy of an earthworm is much simpler than that of a man.

和人类比较起来，蚯蚓的身体结构要简单多了。

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 。

Lumbrokinase was readily obstained in saline extracts of the earthworm, widely distributed in the entocoele of alimentary tract.

蚓激酶在蚯蚓的生理盐水提取物中很容易获得，广泛分布于消化道的肠腔。

Earthworm climb, rain tangled.

蚯蚓路上爬，雨水乱如麻。