After lunch, people strolled about, by twos and threes, through the house and garden, enjoying the sunshine without and within.

午餐后，大家都三三两两地散起步来，穿行在屋子和花园中，享受着里里外外的阳光。

In the meantime I was watching the workingmen enter by twos and threes; and more than two hundred had already entered.

这时，劳动者三三两两地过来，已聚集了两百多人。

They were thumping him by twos and threes and tens till his eyes turned round and round.

他们三三两两地打他， 直到他的眼睛转来转去。

Once you have this value, you can easily solve equations two and three by substituting in the new I2 solution.

一旦你有了这个值，你可以很容易地通过代入新的 I2 解来求解方程 2 和 3。