Insects and worms are all invertebrates.昆虫和蠕虫都是无脊椎动物。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.But regulators with spine are still better th...
It was fatiguing sometimes to try to measure up to her standard of perfection...有时候，力求达到她尽善尽美的标准让人觉得很累。It was fatiguing sometimes to try to measure up to her standard of perfection.有时候，力求达到她尽善尽美的标准让人觉得很累。He was fatiguing...
The ball rebounded from the goalpost and Owen headed it in.球从门柱弹回，欧文头球将球攻进。Tom booted the football over the goalpost.汤姆把足球踢过了球门柱.The football bounced off the goalpost.足球击中球门柱弹了出去....