one by one

• 一一看过

  see one by one

• 一一记在心里

  commit to memory one by one

• 给他一一介绍

  introduce to him one by one

• 这些细节问题这里不一一说明。

  These specific issues won't be explained here one by one.

• 不可能把所有这一类企业一一列举出来。

  These types of companies cannot all be listed here.