flown on的用法和樣例：
例句
- Some people are not very careful about counting their change in shops but there are no flies on him. He always makes sure of his money.
有些人不注意在商店里數一數找給他們的零錢(qián)，不過(guò)他是很精明的。他總是把他的錢(qián)點(diǎn)得清清楚楚。 - He'll do the job properly; there are no flies on him.
他會(huì )把這樁事辦妥的，他是個(gè)精明人。
