It is asserted that．．．有人断言．．．
It is believed that．．． 据认为．．．．，人们相信．．．．
It is considered that．．．有人认为．．．
It is reported that．．．据报道．．．
It is said that．．．据说．．．．
It is supposed that．．．据推测．．．
It is told that．．．据传．．．
It appears that看来似乎．．．，好像．．．
It is well known that．．．众所周知．．．
It is estimated that．．．据估计．．．
It was pointed out that．．．有人指出．．．
It is generally accepted that．．．人们通常认为．．．，一般认为．．．，大家公认．．．
It is alleged that．．．人们断言．．．
It is claimed that．．．有人主张．．．，人们要求．．．
It cannot be denied that．．．不可否认
It has been found that．．．实践证明
It is predicted that．．．据估计．．．，据预测．．．

It is suggested that．．．有人建议．．．

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