A small blood-feeding arachnid that attaches to skin.

• Found in grass and woodland; some species transmit disease.

一种吸血的小型蜱螨类节肢动物，附着在皮肤上。

• 常见于草地和林地；有些种类可传播疾病。

A small mark (✓) indicating selection, correctness, or completion.

• Common in lists, forms, and voting.

表示选择、正确或完成的小记号（✓）。

• 常用于清单、表格和投票。

A short, light clicking sound, especially from a clock.

• One counted movement of a clock’s mechanism.

短促轻微的咔哒声，尤指钟表发出的。

• 钟表机构的一次计数性运动。

To make a regular clicking sound, as a clock does.

发出有规律的咔哒声，像钟表那样。

To mark with a tick/check; to check off an item.

用对勾标记；将项目勾选为完成。

To function or operate, especially mechanically.

• Figurative: to have motivating inner workings.

运转或工作，尤指机械地运作。

• 引申：具有内在动因或运作方式。

A very short moment; an instant.

• Chiefly informal, often in the phrase in a tick.

极短的片刻；瞬间。

• 多用于口语，如在“一会儿”这种表达中。