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.LBG还 可与黄原胶和角叉胶单环反应,形成坚硬凝胶.LBG also interacts with xanthan and carrageenan helices to form rigid gels.用无溶剂法合成了一种单...
Someone comes in every day to check all is in order.每天都有人来检查是否一切都井然有序。I'd like to check the balance in my account please.请查一下我的账户余额。The city police set up roadblocks to check passing vehicles.该市警察设置了路障以检查过往车辆。...