霍尔先生明白虽然数学对他来说是很容易的，但是对学生来说却很难。

Mr. Hall understands that although math has always been easy for him, it is not easy for the students.

youdao

霍尔先生明白虽然数学对他来说是很容易的，但是对学生来说却很难。

Mr. Hall understands that although math has always been easy for him, it is not easy for the students.

youdao