My boss gives me a free hand in deciding which outside contractor to use.

老板让我自主决定聘用哪家外部承包。

We got estimates from three different contractors before accepting the lowest.

我们到三个承包报价后, 接受了最低报价。

Contractors winning construction jobs had to kick back 2 per cent of the contract price to the mafia.

赢建筑工作承包出合同价百分之扣给黑手党。

Therefore in the construction contract uses the advanced payment, the contractor may exercise unassured pleadings to guard project funds is delayed in payment.

因此，在适用预付款合同中，承包可以行使不安抗辩权，以防范工程教拖欠。