在前zài qián
afore, ahead, antecedently, before, prior to
之前zhī qián
pre-; ago; forestall; prior to; before
原声例句
朗文OCLM-01单词
Vegetarian meals are provided by prior agreement.
【prior】通过事先安排可提供素餐。
当月 VOA Daily Standard English
" ... can only happen with explicit prior direct agreement from Iran, but this is very different from saying that Iran ordered these groups to do these attacks."