他长期天天练习书法，所以他经常洗刷子的池变成了黑色。

He practiced calligraphy all day long so he washed his brush frequently that the pool finally turned black.

youdao

他长期天天练习书法，所以他经常洗刷子的池变成了黑色。

He practiced calligraphy all day long so he washed his brush frequently that the pool finally turned black.

youdao