Each of these life - sustainng agents begins as a stem cell , a sort of hematological embryo.这三种维持生命的要素都起源于干细胞.干细胞是血液的胚胎.Dolly's legacy includes the possibility of making patient - specific embryonic stem cell lines...
And you can also find the crematorium with running overloaded.此外,你还可以看到整日超负荷运转的焚尸炉.The risk does not detract from Nixon's courage in running it.危险无损于尼克松甘冒风险的勇气.She changes her look so often that she never seems the ...
The polypepticle chains in elastin are present in a random arrangement.弹性蛋白内的多肽链以一种纹乱的排列而存在.They have a yellowish color owing to the accumulation of elastin in the media.因中膜中含有很多弹性纤维所以呈黄色.Collagen and elastin provide the...
The Committee said his actions were improper and repugnant.委员会称他行为失当，令人反感。an improper course of action不正确的做法What an improper suggestion!多么不体面的建议!Mr Matthews maintained that he had done nothing improper.马修斯先生坚称他没有做过非法的事情。...
In the distance I could hear the chug of farm machinery.离老远，我都能听到农机具的突突声。The wail of the bagpipe could be heard in the distance.远远地能听到风笛的呜咽。Somewhere in the distance a siren hooted.远处某个地方响起了警报声。...