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We need to prevent contamination in our factory. Do you have any good ideas?: 我們希望防止工廠污染，有什么好辦法嗎？

That sounds like a good idea. Ok, can you run some tests and see how much it can improve the cleanness?: 聽(tīng)起來(lái)不錯(cuò)。
OK，能幫我測(cè)試一下可以改善多少清潔度嗎？

When you're finished please give me some feedback on the results.: 結(jié)果出來(lái)后請(qǐng)告知我。

使用improve的表達(dá)還有“improve efficiency（提升效率）”、
“improve productivity（提升生產(chǎn)效率）”等。