常常是用离心法分段收集沉淀的.Precipitates are usually collected by centrifugation at intervals.它可以用离心法分离.This can be separated by centrifugation.结论: 密度梯度离心法分离获得的人胚胎骨髓间充质干细胞纯度高.Conclusion: High purity of MSC can be obtained by density ...
Igloos are usually dome - shapedand are made of large slabs cut from compacted snow.雪屋通常都是圆顶结构,由坚实的冰雪割成大块的冰砖搭建而成.corpses laid out on cold mortuary slabs放在冰冷的停尸桌上的尸体Slabs of rock had slipped sideways in the remote past, a...
沙砾覆于铁质土层与砂砾层之上.Gravelly - sand over an iron - pan and gravel layer.小石头、砂砾层也可用来做隔绝层,以保持水分,降低土壤的温度.Pebbles and gravel also insulate the soil to keep surface temperatures low and preserve water.古河谷的边缘地带,往往缺失底部的河床相砂砾层.The ed...
a child with an enquiring mind有好奇心的孩子I was enquiring in Lost Property at Derby.我当时正在德比的失物招领处打听。I have always had an enquiring mind where food is concerned.我在吃的方面一向很爱探究求索。...an enquiring glance.探询的一瞥I have always had an e...
个人会员费13英镑（无工作者7英镑）。Individual membership costs £13 (£7 unwaged).支付一年的会员费就可以成为会员。You can become a member by paying the yearly subscription.我已经交了我的会员费.I've already paid my membership dues....
He was well acquainted with the literature of France, Germany and Holland.他对于法国、德国和荷兰的文学了如指掌。He knew what he wanted to do from the age of 14.他14岁起就知道自己日后干什么了。He was hand-picked for this job by the Admiral.他是由海军上将精心挑选出来担任...