Per
这个工厂年生产力可达300兆瓦时
The factory is capacity of up to 300 megawatt hours (MWh) per year.The factory is capacity of up to 300 megawatt hours (MWh) per year.字典：关于per的解释
和老外接触中，经常会听见他们说per, 它的副词意思是指“每次、每个”
Will doesn't get paid per view or per story. 威尔不是按照报道和评论的点击量收钱的。It's on the per diem that they give us. 这是他们给我们的每日津贴。We estimated annual global incidence is 40-80 cases per million population. 我们估计每年全球发病率为每百万人有40-80例。实战演练
per案例一
per案例二