每条连衣裙都缝上了褶边,并经过严格的检查,不允许有任何瑕疵。Each dress is hemmed and scrupulously checked for imperfections.他穿得很奇怪,衬衫和裤子外面套着件镶褶边的粉红围裙。He was wearing, astonishingly, a frilly pink apron over shirt and trousers.外面穿着镶有褶边的衣服;里面穿着冒牌香奈尔时装。F...
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...