by twos

• 每两人； 成双地； 两个地

by twos的用法和样例：

例句

1. The children went in two by two.
   孩子们两个两个地进去。
2. Its members fell off one by one.
   它的成员一个个地退出了。

词汇搭配

• by ones and twos 一两个(零零落落地)...
• by twos and threes 两三个一次(三三两两...