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 ...
He's out and away the cleverest boy in our class.他绝对是我们班上最聪明的学生.I'm opposed to the idea of creaming off the cleverest pupils and sending them to a special school.我反对把最聪明的学生挑出来送往专门学校的主张.The cleverest housewife c...