已经分化的组织分泌物称为抑素.Substances differentiated tissues secrete are called chalone.目的:在酿酒酵母中表达和分泌人血管抑素.To express and secrete human angiostatin in S . cerevisiae.目的 观察生长抑素十四肽 ( 施他宁 ) 对食管静脉曲张破裂出血的治疗效果.Aims : To evaluate the effe...
We were crouching in the bushes.我们蹲在树丛里。The cat was crouching in the grass, waiting for the bird.这只猫蹲伏在草丛里, 等着捉那只鸟.There was a cat crouching in the corner.角落里蜷缩着一只猫....
老师不应该频繁走动，因为这会加大唇读的难度。The teacher should not move around too much as this makes lip reading more difficult.有的聋哑人练就了很强的唇读能力.Some deaf and mute people have strong lip - reading ability.我也较早地学会了唇读并且能够通过口语表达自己.I learnt to re...