回答

・there is room for improvement
・there is admit of improvement

「還有改進的空間」可以用英語 there is room for improvement 或 there is admit of improvement 來表達。

The curry wasn't that delicious, but there is room for improvement.
（咖哩不是很好吃，但還有改進的空間。）

I think this design is high level of perfection, but there is still admit of improvement.
（我覺得這個設計已經比較完整了，但還有進步的空間。）
※ high level of perfection（高水準的完美）

有幫助｜0