capacity

Compared meaning: having the ability to do something (noun).

比较义项：具备做某事的能力（名词）。

• capability

  Refers to the practical skill, power, or performance that a person, machine, or organization actually has to do something; common in technical, military, or business contexts; usually followed by 'to' + verb.

  指某人、机器或组织实际具备的、能够做某事的技能、力量或性能；常用于科技、军事或商业语境；后面通常接“to+动词”。

  The new software update finally gave the phone the capability to shoot 4K video.

  这次新的软件更新终于让手机具备了拍摄4K视频的能力。

• capacity 本词

  Emphasizes an inherent or potential ability, often mental, emotional, or intellectual, rather than a demonstrated skill; frequently paired with 'for' + noun/gerund.

  强调一种内在的或潜在的能力，常指心理、情感或智力方面，而非已证明的技能；常与“for+名词/动名词”搭配。

  Even under intense pressure, she showed a remarkable capacity for calm decision-making.

  即使在巨大的压力下，她也展现出令人惊叹的冷静决策能力。

Capability and capacity both mean ability. Capability is the practical skill or power someone actually has to do something, common in technology or business. Capacity is more an inner, potential ability, often mental, used with 'for.' Capacity's other senses (size, job role) are not compared.

这两个词都表示“能力”，但capability更强调实际具备的技能、性能或实现某事的实际力量，常见于科技、军事、商业语境；capacity更强调内在的、潜在的能力或素质，常与介词for搭配，多见于心理、智力语境。这里不比较capacity的“最大容量”（如体育场座位容量）和“身份、职位”（in his capacity as manager）等其他义项。