There are several other excretory mechanisms in earthworms.蚯蚓有好几种排泄机制.In the earthworm and many other invertebrates, these excretory structures are called nephridia.在蚯蚓和许多其它无脊椎动物中, 这些排泄结构称为肾管.Describe the excretory syste...
If the eyes are severely strained , they become bloodshot.如果眼睛过于疲劳就会充血.If the eyes are severely strained, they become bloodshot.如果眼睛过于疲劳就会充血。Her eyes were also bloodshot and weary.她的眼睛也有血丝,很疲惫.John's eyes were blood...