候车室的公告牌要求人们不要吸烟和随地吐痰。Notices in the waiting room requested that you neither smoke nor spit.随地吐痰招致疾病的传播.Spitting in the street leads to the communication of disease.吐痰是不好的行为.It's bad to spit....
Arginine methyltransferase play very important roles in protein post - translational modification.精氨酸甲基转移酶在蛋白质转录后修饰中起着重要作用.Gamma - tocopherol methyltransferase ( � � - TMT ) played a significant role in vitamin E pathway...