I encountered a hard math problem when doing homework, but I successfully figured it out after careful thinking.

我在做作业时中遇到一道数学难题，经过缜密的思考我解出来了。

youdao

I encountered a hard math problem when doing homework, but I successfully figured it out after careful thinking.

我在做作业时中遇到一道数学难题，经过缜密的思考我解出来了。

youdao