在所有的实验室里测量质量的工具是砝码和天平.Scales and balances are the tools of mass measurementin all laboratories.需要一套经过校准的砝码.A set of calibrated weights will be needed.对于小模型,可用装满铅丸的容器作为砝码.For small models we can use as weights containers ...
This gaseous impurity is able to bring about metal corrosion and contaminating.这些气相杂质的存在会造成金属材料腐蚀,并污染环境.Untrammelled industrialisation, particularly in poor countries, is contaminating rivers and aquifers.不节制的工业化, 尤其是在穷国...
Her whole body tautened violently.她全身紧绷得厉害。The skin of her cheeks tautened.她紧绷着脸.The shadows in the room deepened. It grew frightfully a tense stillness that tautened my nerves.屋里的阴影更深了,静得吓人,这种紧张的寂静令我的神经难以忍受....
He knew what he wanted to do from the age of 14.他14岁起就知道自己日后干什么了。They had alienated the one man who knew the business.他们弄僵了同那个唯一懂行的人之间的关系。He knew when to leave well alone and when to interfere.他知道什么时候该适可而止,什么时候该插手干预。...