The matter in your composition is quite good but the writing is not lucid enough.
你的作文内容很好，但文字不够简单明了。
The matter in your composition is quite good, but the writing is not lucid enough.
你的作文内容很好，但文字不够清楚。
The matter in your composition is quite good, but the writing is not lucid enough.
你的作文内容很好，但文字不够清楚。
应用推荐