海蜘蛛与陆生蜘蛛之间存在了明显的区别，它们很可能与所有现代节肢类动物拥有一个共同的祖先，节肢类包括昆虫、甲壳类以及其他具备外骨骼的动物。
Not to be confused with terrestrial spiders of any kind, sea spiders may be related to a common ancestor of all modern arthropods, including insects, crustaceans and other animals with exoskeletons.
一项最新研究显示了古生菌的重要性。为了了解所有的生物，可以将生物划分为三大类，古生菌便是这三大类中的一类生物。
NEW RESEARCH SHOWS THE IMPORTANCE OF ARCHAEA, ONE OF THREE DOMAINS INTO WHICH ALL LIVING THINGS ARE CLASSIFIED, FOR UNDERSTANDING ALL OF BIOLOGY.
其中A类人更受商业界欢迎，他的工资为wA(他一生的收入的现值)高于B类人员的工资收入wB。
Type a is worth more to businesses, and the competitive wage wa (expressed as a present value of lifetime earnings) for type a's is higher than the wage wB for type b's.
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