Ability，Faculty和Capacity三个单词均有能力的含义。

Ability，为通用词，指天生或后天所得的干好某事的能力，尤指实施法律行为的权力（利）（power to carry out a legal act），如 the ability to enter into an agreement with others。

Faculty，相比之下faculty则主要指某种特殊行为的天赋能力，在离婚案件中可指丈夫对妻子提供扶养费的能力。婚姻法中丈夫扶养妻子的能力，这种能力可以是暂时的或永久性的，包括丈夫的有形财产和收入、取得收入的能力等。

In the law of divorce,the capability of the husband to render a support to the wife in the form of alimony,whether temporary or permanent, including not only his tangible property,but also his income and his ability to earn money

Capacity，也称为legal capacity，多表示在法律或其他意义上的一种地位或资格。The legal ability or qualification to perform an act having legal consequences, such as entering into a contract, making a will, suing or being sued, committing a crime, or getting married.

参考双语例句：

①It is essential to strengthen the work of the judiciary, especially the Supreme Court, guaranteeing its ability to exercise its responsibilities with independence, security, freedom and professionalism, without restrictions or pressure.

最重要的是加强司法机构尤其是最高法院的工作，保障其有能力独立、安全、自由和专业地履行责任，不受限制或压力。

②It carried out the recommendations adopted at the conference on reviewing the curricula of relevant faculty departments to incorporate information on children’s rights.

高等教育部执行了该次会议通过的关于对在相关院系的课程中纳入有关儿童权利信息的情况进行审视的建议。

③The Group reiterates its recommendation that UNOCI hire qualified customs consultants to provide a consistent monitoring capacity to its Integrated Embargo Monitoring Unit and to carry out physical inspections of cargoes based on a risk assessment strategy (see S/2010/179, para. 123), with a view to uncovering potential violations of the embargo on arms and related materiel.

专家组再次建议联科行动聘用若干合格的海关咨询人，为综合禁运监察股提供协调一致的监测能力，并依据风险评估战略(见S/2010/179，第123段)对货物进行实物检查，以揭露可能违反武器和相关材料禁运的情况。