Schools should not compete with each other or attempt to poach pupils.学校之间不应该相互竞争，也不应该企图挖走彼此的学生。Charles has never felt the need to compete with anyone.查尔斯从未感到有与任何人竞争的必要。Every time I sing that line, I have to compete with...
A metering tank is an elementary method of measuring volume flow.量筒是测定容积流量的基本方法之一.Practical flow - metering devices have become available commercially.实用的流量测量装置已在工业上使用.A nearly constant air - fuel ratio is maintained by ...