To polish up your article, you can use more figures of speech such as metaphors.

为了给你的文章润色，你可以更多地使用例如比喻等修辞手法。

I want to polish up my English.

我需要改善我的英语。

I need to polish up my English.

我在提高我的英语。

I need to polish up on my Spanish.

我必须增进我的西班牙文。

You are now ready to polish up the first draft.

现在，你要准备对第一份草稿进行润色了。