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....
His advise is useless to our project.他的建议对我们的计划没有什么价值。Astronauts will make a final attempt today to rescue a communications satellite from its useless orbit...今天宇航员将会做最后一次尝试,力图把一颗通信卫星从无效的轨道上抢救下来。They weeded out useless b...
English has hurt me a thousand times, but I still regard it as my first love.英语伤我千百遍，我待英语如初恋。I picked first all the people who usually were left till last.我先挑出了所有通常留到最后的人。It is better to stretch the tight muscles first.最...
a balmy summer evening清爽宜人的夏夜This balmy weather is a herald of spring.这种温和的天气是春天的预兆。A balmy breeze refreshed us after the sultry blast.热浪过后,阵阵微风使我们恢复了精力....