opinion是意见的意思，而 claim则是宣称的意思，区别可以从以下例子看出：
He has claimed that is his area, but according my view, it is public area, what is your opinion? Or we need to for legal action for that. 他声称那是他的领域，但在我看来，这是公共领域，你有什么看法？ 或者我们需要为此采取法律行动。
水利万物而不争,
而万物莫能与之争。
