Of 能省么``~~

He becomes more appreciative of the meaning of life 第一个OF能去掉么 ` 在句子中有什么作用``

还有这个 These goods are of perfect quality` 我一看到这样的句子就郁闷`` 一直觉的of可以不用`` 但碰到不少这样的句子`` 高人解答一下`~~ of的用法`
英语中be of +n= 相应名词的形容词 ` 记下了```

of in out of?? because of thousands of tears of... of which thousand of tales of billions of？？？ think of