for:indicating a length of time 表示一段时间
用法:I'm going away for a few days.我要离开几天.He was in prison for twenty years.他在监狱中蹲了二十年.
并且它被广泛用于制造蒸汽轮船已经有上百年的历史了.
for:indicating a length of time 表示一段时间
用法:I'm going away for a few days.我要离开几天.He was in prison for twenty years.他在监狱中蹲了二十年.
并且它被广泛用于制造蒸汽轮船已经有上百年的历史了.