最重要的原因英语

the most important reason

One of the most important reason is that Mickey is like a normal person，but he always tries his best to face any danger.……之一用one of表示，最重要的原因是一个最高级，是the most important reason，总是努力去做某事，可以用try ones best to do sth.尽某人最大努力做某事