It is a fact that… .…是一个事实

It is well-known that… 众所周知……

is no doubt that… 毫无疑问……

I think 我认为

Contrary to the popular thought, I prefer… 与流行的想法相反，我更喜欢

Some people say/believe/claim that… 有人说/相信/声称

It is generally believed that… 人们普遍认为

It is widely accepted that… 是被广泛接受的

It is argued/held that… 有人认为

While it is commonly believed that…, I believe… 虽然人们普遍认为……，我相信

It can be concluded 可以得出结论

People’s views vary from person to 人们的观点因人而异。