there are no flies on something

• 无可指责；无可非议

there are no flies on something的用法和样例：

例句

1. There are no flies on this transaction.
   这是件无可指责的交易。
2. No blame is attached to his behavior.
   他的行为无可指责。
3. No blame is attached to his act.
   他的行为无可非议。
4. There seems to be no objection to your accepting the invitation.
   您接受邀请似乎无可非议。