terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers 同义词：angleworm, fishworm, fishing worm, wiggler, nightwalker, nightcrawler, crawler, dew worm, red worm,
An earthworm is a tube-shaped, segmented animal that is commonly found living in soil. Its digestive system runs straight through its body, it conducts respiration through the cuticle covering its skin, and it has a simple, closed blood circulatory system.
例句与用法
1.
Earthworms may produce antibiotic substances . 蚯蚓可以产生抗菌物质。
2.
The larvae of flies parasitize earthworms . 蝇的幼虫寄生在蚯蚓上。
3.
The earthworm population had declined by 70% . 蚯蚓数量下降70。
4.
Earthworms have been eaten to cure impotency . 服蚯蚓可治疗阳萎。
5.
The ova of earthworms are contained in cocoons . 蚯蚓的卵是包在茧里的。
6.
Earthworms have been used in testing pregnancy . 蚯蚓被用于妊娠反应试验。
7.
Earthworm channels greatly aid root growth . 蚯蚓洞穴极有助于植物根系生长。
8.
An earthworm is a terricolous organism . 蚯蚓是陆生的生物。
9.
Earthworms comminute the mineral fraction of soils . 蚯蚓粉碎土壤中的无机物碎片。
10.
Many species of earthworms produce cocoons through the year . 许多种蚯蚓全年产茧。
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