势力的英文：
power
ability to nfluence

参考例句：

The king sought to aggrandize himself.
国王企图增强自己的势力。

The forces representing the advanced ideas are bound to triumph sooner or later.
代表先进思想的势力总有一天会成功的。

They gathered to protest against the Renaissance of the extreme right.
他们聚集起来抗议极右势力的复活。

The remainder of Al Qaeda and Taliban force may start new attacks.
盖达和塔利班组织残余势力可能发动新攻势。

consumerism in this second sense and environmentalism, both powerful in Western societies, do not coexist comfortably
作为这第二种意思的消费主义与环保主义在西方国家都很有势力，但二者是不能和睦共存的。

Sihanouk might emerge in an important, perhaps decisive, role as a link between contending forces and as their balancer
西哈努克就有可能作为两个对立势力之间的联结人和平衡者发挥重要的，也许是决定性的作用。

Feudalistic influence
封建势力

To lean on influential power
凭仗势力

The kingdom's power declined.
王国的势力衰弱了。

A baleful look,influence,presence
凶恶的样子、势力、态度.

power是什么意思：
n. 力量；动力；能力；权力；大国；机能；体力
v. 给…提供动力

smoothing power
修匀功效

These drugs are powerful.
这些药物很有效。

Applications of Power Electronics Technique in Power System
电力电子技术在电力系统中的应用

ability是什么意思：
n. 能力，力量

Prerequisite: Ability to use telekinesis as a supernatural ability.
先决条件：能以超自然能力使用心灵遥控能力。

The ability of bacteria to be genetically transformable.
遗传力细菌的遗传性转化的能力。

lacking the ability needed;incapable
不胜任的;无能力的