Dangerless
a. 無危險的；脫離危險的
??? 情景例句
You're just wasting your breath.
你在白費口舌。
I would like to talk to your chief.
我想請你們主管講話。
In this way, we have learned all that we know of the laws of astronomy,
例如，用這種方法，我們完全掌握了天文學的規律。