另两个为胸腺嘧啶和胞嘧啶, 即称为嘧啶的单环结构.The other two, thymine and cytosine, are single ring structures called pyrimidines.直到不久以前,人们对胸腺的功能尚不明了.The function of the thymus was unknown until relatively recently.动物的免疫系统由两个主要部分组成,即胸腺和骨髓系统.I...
他对大自然怀有一种极为纯粹的乌托邦式看法。His was a utopian vision of nature in its purest form.对外来者怀有敌意是人类和其他动物共有的特征。Hostility towards outsiders is characteristic of both human and non-human animals.之前年少时对理想抱负怀有的一腔热情很快便被现实浇灭。The early ambit...
她对如何牵动读者的心弦了如指掌。She knows exactly how to tug at readers' heartstrings.她的话深深地拨动了我的心弦.Her speech struck a deep chord in my heart.那位妇女的悲惨经历触动了我们的心弦.That woman's sad story touched our hearts....
Was he afraid, he was asked. 'Afraid of what?' he retorted...有人问他是否害怕。“害怕什么？”他反问道。She retorted upon me, saying I was to blame.她反驳我, 说我才应该受责备.Chang Su - su retorted hastily , looking slightly belligerent.张素素又抢着反...