Complement enzymes attack antigens by puncturing the cell membrane.补体酶通过刺穿细胞膜来攻击抗原.Some antigens, or combinations of antigens, are much more potent than others.某些抗原或者联合抗原可比其它抗原作用强得多.There are numerous inherited antigens ...
不可滥服古柯碱.Don't have cocaine abusively.古柯叶也应用于仪式 、 医药与其他产品.It is also used in rituals, medicine and other products.古柯叶也可拿来泡茶治疗惧高症.The leaf is also used as a tea for altitude sickness....
电梯开动了，接着剧烈震颤起来，然后就毫无反应了。The lift started off, juddered, and went out of action.电梯嘎吱一声停在了一层。The elevator creaked to a halt at the ground floor.电梯修理工可以转动这根杠杆直接操作机器。An elevator mechanic can work the machinery directly by tu...