选购方法英文

right time,right method

with the right way at the right time

choose a proper method at the proper time(situation,condition)看你的“时候”具体是指时间，情形还是条件了

Pick out the appropriate method in appropriate time.个人意见用pick out挑选更好一点呢，亲可以斟酌。

pick upe.gI'm picking up some things, and you? 我想选购一些东西，你呢？