inbusiness和onbusiness有什么区别?

Question

in business和on business有什么区别?

Answer 1

I'm here on business.我到这儿来办公事. 
No admittance except on business.闲人免进..
In business a poker face can be very useful.生意场上,不动声色会非常有用.
The royalties enabled the inventor to re-establish himself in business.专利使用费让这位发明家得以再次立足于商界.
     in business是做生意,或生意场上等意思.
     on business（= for one's work）是公事,或有事的意思.