昆虫和蠕虫都是无脊椎动物。Insects and worms are all invertebrates.在蚯蚓和许多其它无脊椎动物中, 这些排泄结构称为肾管.In the earthworm and many other invertebrates, these excretory structures are called nephridia.公园里的本地特有的脊椎动物和无脊椎动物也很多.Endemism of vertebrate...
Buying expensive furniture is not necessarily the smartest move to make.购买昂贵的家具不见得就是最明智之举。All the pretty women wore their smartest dresses.所有漂亮的女士都穿着最漂亮的连衫裙.I've never been the smartest person in the room before.我从来...