写作能力不强，essay该怎么办呢？

Write it in Chinese first and then translate it. 

Find reviewers who can also read your original Chinese version and help you better convey that idea in English.

Revise revise and revise some more. 

谢谢指教。我也这样想，但是找到会写的朋友或同学似乎有难度，只有自己先写中文再慢慢翻译了。不知道对于短期提高写作水平是否有什么好方法或者书籍。