powerful adversary的用法和样例：
例句
- I worked hard on an energy plan against stiff opposition, but I had made a powerful adversary in APL, which had offices in most counties.
我顶着巨大的阻力，非常努力地运行一个能源计划，但我已经将阿肯色电力与照明公司变成了自己的一个劲敌，而这个公司在多数县里都有办事处。 - Thunderaan was a powerful foe, even to an elemental lieutenant such as Ragnaros, and the Firelord was unable to completely destroy him as he had hoped.
桑德兰即使是对拉格纳罗斯这样的元素长官来说也是一位劲敌，最终炎魔也无法如预期那样完全摧毁它。
