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 ...
西蒙拨完号,把听筒贴在耳边。Simon finished dialing and clamped the phone to his ear.他慢慢挪向电话机,准备抓起听筒。He edged closer to the telephone, ready to grab it.她拿起电话听筒,开始拨打莫里斯·坎贝尔的号码。She picked up the phone, and began to dial Maurice Campbell&...
纽因顿仰头大笑。Newington threw his head back and cackled with laughter.马克斯仰头大笑起来。Max threw back his head and roared with laughter.八点五十分,满船人,都在仰头观望.At 8:50 all aboard are looking up....
He was working absorbedly when she entered.她走进来时他正在全神贯注地工作.You are too impatient definitely, must count absorbedly, and count meet to 10 thousand ability effective.你准是太心急了, 必须专心一意地数, 并且数到1万才会有效.Debbie sat among them in h...
你会喜爱旧城里的那条吹笛人小巷.You will enjoy Piper's Alley in Old Town.穿彩衣的吹笛人使得汉姆林镇所有的孩子都跟着他走.The Pied piper had all the children of Hamlin on his heels.吹笛人彼得挑选了一大堆腌胡椒.A dried berry of the pepper vine Piper nigrum....