氨基酸是弱酸和弱碱, 因此, 它们是很好的缓冲剂.Amino acids are weak acids and weak bases, therefore, they are excellent buffering agents.缓冲剂可以像烤面包的苏打粉那样使用,它们都能够使ph值保持稳定.Buffers can be used like baking soda will help keep ph stable.着重叙述了缓冲剂原理及...
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.因此,研究者转向研究缺乏纤毛的突变异种老鼠的细胞.So the researchers turned to mutant mice with cells that lacked cilia.目的了...
A bridge spanned the rill.一座桥横跨小河。A ditch diverted water from the rill into the fields.一条沟渠把水从河里引向田间.The surface shows deep rill - like folds.表面有深沟槽 状 起伏褶皱.From a practical standpoint, rill erosion forms small channels.从...
Nobody should be trumpeting about chemical weapons.任何人都不应大肆鼓吹化学武器。She is always trumpeting her son.她总是吹嘘她儿子.The wind is trumpeting , a bugle calling to charge!风在掌号.冲锋号!...