例句與造句

1. Those costs that are incurred by the factory for the benefit of production in general , and which can not be identified with indi ? vidual units of activity , are known as indirect costs
   那些為企業(yè)的總體生產(chǎn)管理而發(fā)生的成本，不能分清它是為哪種工作而發(fā)生的，這樣的成本為間接成本。
2. It's difficult to find unit of activity in a sentence. 用unit of activity造句挺難的