改善 用英语怎么说

改善 can be translated to "improvement" in English. This comes from the verb "improve," which means to make or become better. Here are some examples of how "improvement" can be used in a sentence:
The company is looking for ways to make improvements to its products.
There has been a noticeable improvement in the air quality since the factory closed down.
The new teacher has brought about a great improvement in the students' grades.
In Chinese, these sentences would be:
这家公司正在寻找改进产品的方法。
自工厂关闭以来，空气质量明显改善。
新老师带来了学生成绩的显著改善。