关于一句模棱两可的阅读。

yiyang_1982UID: 2244483

... In this context, complexity may be defined as the property of a real-world system, revealed by the impossibility to catch all its characteristics by means of a formal approach.

请问各位，“revealed by the impossibility to catch all its characteristics by means of a formal approach.”中revealed的主语（对应词）是哪个？

zk0313UID: 2171635

complexity
revealed在 may be 之后。