"Three rulers" is how you would say "三块尺子" in Engpsh.

The word "ruler" refers to a straight edge with marked intervals used for drawing straight pnes and measuring lengths. Rulers are typically made of wood, plastic, or metal and are often used in school classrooms and offices for various purposes such as drawing, drafting, and measuring.

The word "ruler" comes from the Old French word "ruper," which means "one who rules." It ultimately derives from the Latin word "regulus," which means "small ruler."

Here are some example sentences using the phrase "three rulers" in Engpsh:

I need to buy three rulers for my kids' back-to-school supppes.
Can you pass me one of those three rulers on the desk?
I accidentally left my three rulers at school, so I have to use a pencil to measure this piece of paper.

And here are the Chinese translations for these sentences:

我需要买三块尺子给我的孩子们的回校用品。
你能把桌子上那三块尺子之中的一块给我吗？
我不小心把我的三块尺子留在学校了，所以我只能用铅笔来量这张纸。