The effect of the continuous attacks has been to wear out his troops.

　　接連不斷的`攻擊就是要拖垮他的軍隊。

　　Our policy has been to uphold the law

　　擁護法律是我們一貫的方針。

　　The Australian government's answer to the problem has been to throw money at it.

　　澳大利亞政府對這個問題的解決方案一直就是大把往里扔錢。

　　The effect of this has been to increasingly marginalize the local authority sector

　　這件事的影響是使地方當局越來越受到排斥。

　　The technique has been to mutate the genes by irradiation or chemicals

　　該技術(shù)是通過放射線照射或者使用化學方法使基因變異。