power的形容词怎么写?

　　It is not within my power to help you.

　　我是爱莫能助啊。

　　They could not ensure a smooth transfer of political power.

　　他们无法保证政权的顺利交接。

　　Early results indicate that the government will be returned to power.

　　早期的结果预示这个政府将重新执政。

　　Great art has the power to change lives.

　　伟大艺术品的力量可以改变人们的`生活。

　　The aim is to give people more power over their own lives.

　　目的是让人们更能主宰自己的生命。