Earthworms burrow deep into the soil.
蚯蚓钻土很深。
Earthworms do the important job of aerating the soil.
蚯蚓做了使土壤透气的重要工作。
Earthworms, crayfish and tadpoles are examples.
蚯蚓、小龙虾和蝌蚪都是实例。
Garter snakes detect a chemical signal from earthworms—one of their favorite foods—via the VNO, and they use this signal to track their prey.
束带蛇通过 VNO探测到来自蚯蚓（它们最喜欢的食物之一）的化学信号，然后它们利用这个信号来追踪它们的猎物。
What can you do with earthworms?
蚯蚓可以用来做什么？
Earthworms in North America before 1492.
1492年之前，蚯蚓在北美大陆的数量为0。
蚯蚓能缩小。
Earthworms play a vital role in food production.
在粮食生产方面，蚯蚓扮演极为重要的作用。
Earthworms may produce antibiotic substances.
蚯蚓可以产生抗菌物质。
The ova of earthworms are contained in cocoons.
蚯蚓的卵是包在茧里的。
Earthworms have been used in testing pregnancy.
蚯蚓被用于妊娠反应试验。
We can see earthworms on the ground after rain.
雨后我们在地上能看到蚯蚓。
Earthworms comminute the mineral fraction of soils.
蚯蚓粉碎土壤中的无机物碎片。
Because earthworms are as biologically complex as any insect.
因为蚯蚓和其他昆虫一样有着一套完整的生物学构造。
There are several other excretory mechanisms in earthworms.
蚯蚓有好几种排泄机制。
Many species of earthworms produce cocoons through the year.
许多种蚯蚓全年产茧。
Earthworms could readily distinguish between different food substances.
蚯蚓能够很快地分辨出不同的食物。
Researchers have discovered such larders with over a thousand earthworms in them.
研究人员们曾发现藏有一千多条蚯蚓的这类贮藏库。
But even to the trained eye, two species of earthworms can be tough to tell apart.
可是，即使是受过训练的眼睛，也可能很难把两种蚯蚓分辨开。
It also keeps water in the soil and protects helpful organisms like earthworms.
它还能够保持土壤中的水分并保护类似蚯蚓的有用生物。
It also keeps water in the soil and protects helpful organisms like earthworms.
免耕还能保持土壤中的水分，保护像蚯蚓这样的有益生物。
Earthworms consume large amounts of soil, and produce a rich humus, perfect in texture.
蚯蚓吃下大量土壤，排出肥力丰富、物理结构理想的腐殖质。
Mother: earthworms because his brother will be drilled soil the land will protect him ah.
妈妈：因为蚯蚓弟弟会钻土，大地会保护他啊。
It also provides a good environment for earthworms and other helpful organisms in the soil.
它还可以提供给蚯蚓和土壤中其他生物体一个很好的环境。
As a main group of animals in the soil, the earthworms play important functions in ecosystem.
蚯蚓是土壤中的主要动物类群，在生态系统系统中具有重要的功能。
They were originally studying what farm beetles eat, and earthworms are one of their favorite meals.
他们最初是研究农场的甲虫吃什么，而蚯蚓是甲虫最喜爱的一种食物。
They were originally studying what farm beetles eat, and earthworms are one of their favorite meals.
他们最初是研究农场的甲虫吃什么，而蚯蚓是甲虫最喜爱的一种食物。
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