大多数海洋腹足纲软体动物在某些幼体阶段形成一种有纤毛的游泳器官。Most marine gastropod mollusks develop a ciliate swimming organ in certain larval stages.我那不怕疲劳的小纤毛每秒钟约做10次清扫动作.My tireless little cilia make about ten sweeping strokes a second.健康的皮肤, 粘膜...
At present are 2 - chloro ben - mode of destructible cover stealthily.目前主要有2种形式可破坏显偷换盖.Abstract: 2 - Chloro - 5 - chloromethylpyridine is an important intermediates of the pesticide and the pharmacology.文摘: 2- 氯 -5- 氯甲基吡...
起初，达特非常紧张，最后终于放松了下来。Dart, who had at first been very tense, at last relaxed.起初，他幸好不知道那些针对他的阴谋。At first, he was blissfully unaware of the conspiracy against him.起初好玩的事很快就变成了艰苦的工作。What started out as fun quickly became har...
Only the finest lacquers are used for finishes.只有上等好漆才能用作罩面漆。In acrylic lacquers this is the only drying mechanism.在丙烯酸漆中,这是唯一的干燥机制.Acrylic lacquers are a blend of resin from the acrylic family.丙烯酸漆是来自丙烯酸家族中的树脂的混合物....
海豹的鳍肢与人类的手臂同源。The seal's flipper is homologous with the human arm.我们可以看到鱼把鳍露出水面.Fish could be sighted finning near the surface.鲸 、 海豹, 企鹅和海龟均有鳍形肢.Whales, seals, penguins, and turtles have flippers....