power的形容词词性是？

I wasn't sure if I could handle such a powerful car.

我没有把握是否能驾驶功率这样大的车。

Only the intervention of powerful friends obtained her release.

经过有影响力的朋友们斡旋她才得以释放。

He elevated many of his friends to powerful positions within the government.

他将许多朋友都提拔到政府部门的要职上。

The rich and powerful make the decisions ─ that's the way of the world.

有钱有势者说了算，这就是世道。

CDTV uses a CD-ROM system that is coupled to a powerful computer.

动态视频系统使用的.是与大功率计算机相连的只读光盘系统。