it be stated that

• 据称

it be stated that的用法和样例：

例句

1. It was stated that standards at the hospital were dropping.
   据称，那家医院的医疗水准在不断下降。
2. It is claimed to have the second largest canopy in the world.
   据称，这棵树的树阴很大，在全世界位居第二。