[singular] a thing that uses a lot of the time, money, etc. that could be used for sth else消耗；损耗；耗费◆The training programme proved to be a huge drain on the company's resources.证明了这项培训计划是对公司资源的巨大耗费。◆Our Canadian operations have become a cash drain.我们的加拿大业务已经成了赔钱的窟窿。a process by which people with important skills, etc. leave an organization or a place in order to work somewhere else人才流失◆There has been a drain of top talent from the company.已经有高层人才从公司流失。  ➡  idiom at money brain drain