capacity
单词辨析：
普通用词，主要用于人，指在智力或体力上能够做某事的实际能力，常后接动词不定式或介词 in/for。
a player of great ability
极有才华的球员
She has the ability to run her father's business.
她有能力经营父亲的企业。
He shows an ability in/for farming.
他显示出农耕方面的才能。
尤指完成有难度的事情所需的能力，常后接动词不定式或介词 of，可以复数形式出现。
manufacturing capability
生产能力
She has the capability to handle the work.
她具备处理这项工作的能力。
Mary has the capability of becoming an excellent teacher.
玛丽有能力成为一名出色的教师。
In her opinion, simultaneous translation is beyond his capabilities.
她认为他做不了同声传译。
指人理解或做某事的能力，或容器、房间等的容纳能力，常后接介词 of/for。
a child's capacity for learning
孩子的学习能力
He has a capacity for computers.
他具有操作计算机的能力。
The fuel tank has a capacity of 50 litres.
这个油箱能装50升油。
强调做某事的非凡能力，常后接介词 in。
You should try to maintain your professional competence.
你应当尽力保持自己的专业能力。
We have doubt about his competence in teaching.
我们怀疑他教书的能力。
He demonstrated thorough competence in dealing with these issues.
他在处理这些问题时完全显示出了他的能力。
相关例句：
In my capacity as an officer of the law, I must do my duty.
作为一名执法官，我必须尽职。
The region is valued for its coal and vast electricity-generating capacity
这个地区因其煤炭资源丰富和发电能力巨大而备受重视。
Ms Halliwell visited the Philippines in her capacity as a Special Representative of Unicef
哈利韦尔女士以联合国儿童基金会特别代表的身份访问了菲律宾。
What's the carrying capacity of this ship?
这艘船载重多少？
A capacity crowd of 76,000 people was at Wembley football stadium for the event.
温布利球场座无虚席，76,000人前来观看这场比赛。
Toronto hospital maternity wards were filled to capacity.
多伦多医院的产房都已住满了。