reason：原因;理由;解釋;正當理由;道理;情理;思考力;理解力;理性。
第三人稱單數： reasons 現在分詞： reasoning 過去式： reasoned 過去分詞： reasoned。
單詞用法：
it stands to reason：這是人人都清楚的；這是明擺著的
例：It stands to reason that they'll leave if you don't pay them enough.
譯：這是明擺著的，你不給他們足夠的報酬，他們就走人。
reason with sb：和某人講道理；規勸
例：I tried to reason with him, but he wouldn't listen.我盡量跟他講道理，可他就是不聽。