on business

1.He is absent on business.

他因事缺席。

2.No admittance except on business.

非公莫入。;闲人莫入。

3.When a lady of Inner Mongolia was on business in Kunming city, she couldn’t help buying a big boxful of flowers to the tempt of cheaper flowers even than little cabbages there.She went home by train.

说是有位内蒙古女士去昆明出差，禁不住那里菜还便宜鲜花诱，一大箱鲜花。