Keep off the subject of politics.勿谈政治。The doctor has advised him to keep off fattening food.医生已建议他不要吃致肥食物.He told the boys playing football to keep off the grass.他告诉那些踢足球的孩子们不要践踏草坪....
Standard Two: The information literate student accesses needed information effectively and efficiently.标准 二: 有信息素养的学生可以有效地获得需要的信息.Conclusion Congenital ptosis can be effectively treated by maximum shortening of upper eye...
Today I went to see my penfriend in Hongye Hotel.今天去红叶宾馆见我的笔友.I have not received any message from my penfriend for almost half an year.我已经大约半年没接到我笔友的消息了....
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.胞嘧 啶 核苷:当胞嘧啶通过β - 糖苷键与D- 核糖接合形成的核苷.Cytidine ( cytosine nucleoside ) A NUCLEOSIDE formed when cytosine is linked ...