Wiggly Worms

Wiggly Worms. Written by Cheryl Reifsteiner.

《扭扭虫》 作者：谢丽尔·赖夫施泰纳

Small animals, big changes. Do you know about earthworms? These small animals change the soil in big ways.

小小生物，巨大改变。 你了解蚯蚓吗？ 这些小小的生物能大大改变土壤哦。

Earthworm Bodies An earthworm's body is shaped like one tube inside another. On the outside is a tube of muscle. On the inside is a tube that breaks down food.

蚯蚓的身体 蚯蚓的身体形状就像一根套在另一根管子里的管子。 外层是肌肉管， 内层是用来分解食物的管子。

The body of an earthworm is made up of many parts. Each part is shaped like a ring and can bend and stretch.

蚯蚓的身体由很多部分组成。 每一部分都像个小圆环，还能弯曲和拉伸哦。

Earthworms move by stretching out their bodies and pulling themselves forward. Short, tough hairs on their bellies help them hold onto the ground.

蚯蚓通过拉伸身体、向前拖动自己来移动。 它们腹部短而坚硬的刚毛能帮忙抓牢地面。

Slimy worms. Earthworms are slimy. The slime helps keep earthworms cool and wet. It also helps earthworms slide through soil.

黏糊糊的蠕虫。 蚯蚓的身体黏糊糊的。 这些黏液能帮蚯蚓保持凉爽湿润。 还能帮蚯蚓在土壤里顺利穿行。