广告者仔细研究了人的本性并且把我们的各种小小弱点一一分类. (makeaclose study仔细研究)Advertisers have made a close study of human nature and have classified all our little weaknesses.每个登广告者支付每次独特的访问不同的款项.Each advertiser pays a different amount per uniqu...
Plankton is at the bottom of the marine food chain.浮游生物处于海洋食物链的最底层.marine planktonic diatom海洋浮游硅藻marine biota海洋生物区marine fauna水产动物Bezanik is diving to collect marine organisms.贝扎尼奇正在潜水采集海洋生物。marine and freshwater eukaryo...