尿液是无菌的。Urine is sterile.这个盖子严实地盖在奶瓶上,保持奶嘴无菌.This top fits over the bottle and keeps the teat sterile.手术室应该是个无菌的环境.An operating theatre should be a sterile environment....
限制饮食和放松身心是保持健康的两个要诀。Diet and relaxation are two important keys to good health.住房条件差、家庭压力大会影响身心两方面的健康。Poor housing and family stress can affect both physical and mental health.长途飞行后，你可能会感到身心疲惫。You may be physically and me...
I shall defer replying till I hear from home.我将等接到家信以后再给你答复.We will defer to whatever the committee decides.我们遵从委员会作出的任何决定.Let's defer the decision for a few weeks.咱们延缓几个礼拜再做决定吧....