All you need is a ruler and a pencil, and The 2.25-inch (5.5cm) Rule.

你只需要一把尺子，一只铅笔和2.25英寸（5.5厘米）法则来判断就可以了。

youdao

All you need is a ruler and a pencil, and The 2.25-inch (5.5cm) Rule.

你只需要一把尺子，一只铅笔和2.25英寸（5.5厘米）法则来判断就可以了。

youdao