by 15 percent/ at 15 percent有什么区别

来源：学生作业帮助网编辑：六六作业网时间：2024/05/22 18:11:30

by15percent/at15percent有什么区别by15percent/at15percent有什么区别by15percent/at15percent有什么区别by15percent指的是（上

by 15 percent/ at 15 percent有什么区别
by 15 percent/ at 15 percent有什么区别

by 15 percent/ at 15 percent有什么区别
by 15 percent指的是（上升或下降了）15%
at 15 percent指的是（上升或下降到）15%
至于是上升还是下降,这要看上下文的语境了.