Chat abbreviation for "of course".

• Expresses obvious agreement or certainty.

聊天缩写，表示“当然”。

• 用于表达明显的同意或肯定。

Fandom term: "original female character".

• A female character created by the author, not canon.

同人圈术语：“原创女性角色”。

• 作者自创的、非正史的女性角色。

Abbreviation for "officer" in titles or reports.

• Used in law enforcement or military contexts.

“officer”的缩写，用于职称或报告。

• 常见于警察或军队语境。

Initialism for "oxygen-free copper".

• High-purity copper used in audio, power, or vacuum systems.

“无氧铜”的缩写。

• 一种高纯度铜，用于音频、电力或真空领域。

Initialism for "orbitofrontal cortex".

• A prefrontal brain region for valuation and decision-making.

“眶额皮质”的缩写。

• 参与价值评估与决策的前额脑区。