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1·There is still room for improvement in your work.

你的工作尚有改进的余地。《牛津词典》

2·There was plenty of room for improvement.

还有很大的改进空间。

3·My ninth-grade art teacher doesn't give any grade above 94% because, she says, There's always room for improvement.

我九年级的美术老师不会给分高于94分，因为她说：“总有进步的空间。”

4·There is still room for improvement.

还有改进的余地。《新英汉大辞典》

5·There is room for improvement.

改进的空间是有的。

6·Often there is room for improvement.

通常情况下仍有改进的空间。

7·Clearly there is room for improvement.

很显然，改进的空间是存在的。

8·But there is always room for improvement.

但是，这一对总觉有需要改进的地方。

9·There is clearly room for improvement, however.

不过，显然有改进的余地。

10·On the latter, there is room for improvement.

对于后者，进行改善的余地还是有的。