I mean business, so you must be careful.我是认真的, 所以你得小心.Now he knows I mean business.现在他了解我是严肃认真的.The Division adhere to the golden mean business, integrity - based.本司坚持中庸从商, 诚信为本....

mean business的音标：mean business的英式发音音标为：[mi:n 'biznis]mean business的美式发音音标为：[min 'bɪznɪs]...

认真的，严肃的...