給出原因:
This phenomenon exists for a number of reasons. First, … Second, … Third, …
這一現象的存在是有許多原因的.首先,……;第二,,……;第三,……
Why did …? For one thing …,for another …. Perhaps the primary reason is…
為什麼會……?一個原因是……,令一個原因是……;或許其主要原因是……
I quite agree with the statement that … The reasons are chiefly as follows.
我十分贊同這一論述,即……,其主要原因如下:
列出解決辦法:
Here are some suggestions for handling … 這是如何處理某事的一些建議.
The best way to solve the troubles is … 解決這些麻煩的最好辦法是……
People have figured out many ways to solve this problem. 人們已找出許多辦法來解決這個問題.