1. Academic writing rules
（1）Do not use contraction (don't, shouldn't), but full spell (do not, should not)
（2）Avoid there is/are(delete them), a lot (many/much), so, but change them into stronger word.
(3) Use strong verb (rather than verbal noun), e.g. give assistance to--> assist
为什么会这样？ 答案：重点在于动词上，如果是verb，像assist，则侧重assist。如果是give assistance，则重点在于give，不再是assist。
