tag

Compared meaning: to attach a label or marker (verb).

比较义项：贴标签（动词）。

• label

  Emphasizes marking something with identifying information (contents, category, warning) so it can be recognized or handled correctly; often formal or informative in tone, common with products, files, ingredients.

  强调用识别信息（内容、类别、警示）标记某物，以便正确识别或处理；语气较正式、偏信息性，常用于产品、文件、成分等。

  The factory workers must label each chemical container before it leaves the lab.

  工厂工人必须在每个化学品容器离开实验室之前贴上标签。

• tag 本词

  Suggests attaching a small, often physical or digital marker for quick identification or sorting; casual in tone, common with luggage, clothing, or tagging people/content online.

  指附上一个小的、通常是实物或数字化的标记，以便快速识别或分类；语气较随意，常用于行李、衣物，或在网上标注人物、内容。

  Don't forget to tag your suitcase before checking it in at the airport.

  在机场办理托运之前，别忘了给你的行李箱挂上标签。

Both mean attaching something to identify an item, but differently. Label stresses marking with information, like contents or a warning, so it is handled correctly; it sounds formal. Tag suggests a small, casual marker for quick sorting, common with luggage or online content.

这两个词在“贴标签”这个意思上很接近，但 label 更强调写明内容、分类或警示信息以便识别，tag 则更随意，常指附上简短的标记或挂签，也常用于社交媒体上标注人物或内容。

Compared meaning: to follow closely behind someone (verb).

比较义项：尾随、跟随某人（动词）。

• trail

  Trail suggests following behind someone at a distance, often to track, observe, or pursue them; it can sound neutral or even suspicious, and also means to lag behind in a race or contest.

  trail 表示在一定距离之外跟随某人，常用于跟踪、观察或追捕，语气较中性，有时略带可疑意味；它也可以表示在比赛中落后于人。

  The wolf trailed the wounded deer for miles before finally catching up with it.

  那只狼尾随受伤的鹿走了好几英里，最后才追上它。

• tag 本词

  Tag (usually as 'tag along') is informal and suggests sticking closely to someone as an extra companion, often uninvited or childlike, rather than tracking or pursuing them.

  tag（常用 tag along）比较口语化，指像跟屁虫一样紧跟着某人，常常是不请自来或带点孩子气，而不是跟踪或追捕的意思。

  My little brother always tags along whenever I go out with my friends.

  每次我和朋友出去，我弟弟总是跟着一起去。

Both mean following someone, but with different tone. Trail is fairly neutral, for tracking or pursuing someone, and can also mean falling behind in a race. Tag (tag along) is informal, suggesting sticking closely as an uninvited companion. Tag's label meaning is not compared here.

这两个词在“跟随、尾随某人”这个意义上很接近，但语气和用法不同：trail 语气较中性，常用于跟踪、观察或追捕某人，也可以指在比赛中落后于人；tag（通常与 along 连用，构成 tag along）语气随意、口语化，多指像跟屁虫一样紧跟着别人，带有不请自来、略显幼稚的意味。这里不比较 tag 的“给…贴标签、标注”这个意思。