It has been viewed that 有人指出

It's hoped that 人们希望

It's well known that 众所周知

It is said that 据说

It is supposed that 据推测

It cannot be denied that 无可否认

It's believed that 据信，我们相信

It's understood that 大家知道

It's widely acknowledged that 大家公认

It's claimed that 据称

It's estimated that 据估计

It can be seen from this that 由此可见

It is now thought that 现在人们认为

It is universally acknowledged that 人们普遍认为

It is generally accepted that 人们普遍认为

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