tap

Compared meaning: a light touch or knock (verb/noun).

比较义项：轻轻触碰或拍打的动作（tap 用作动词，pat 用作名词）。

• tap 本词

  Tap is a verb for a quick, light strike or knock, often repeated, mainly used to get attention or make brief contact — not inherently affectionate.

  tap 是动词，指快而轻的敲击，常常重复进行，主要用来引起注意或做短暂接触，本身并不带亲昵的意味。

  He tapped the window twice to get the waiter's attention.

  他轻敲了两下窗户，想引起服务员的注意。

• pat

  Pat is a noun for a single gentle touch with the flat hand, typically given to comfort, praise, or show affection rather than to get attention.

  pat 是名词，指用摊平的手掌轻拍一下，通常是为了安慰、赞许或表示亲昵，而不是为了引起注意。

  She gave her son a pat on the back for trying so hard.

  她轻拍了儿子的背，表扬他这么努力。

Tap and pat both describe a light touch. Tap, a verb here, is a quick, light strike or knock, often repeated, mainly to get attention, not affectionate. Pat, a noun here, is a single gentle touch with the flat hand, given to comfort or affection.

这两个词都指“轻轻地碰一下”，但性质不同：tap 是快而轻的敲击，多用来引起注意或发出声响；pat 是手掌摊平的轻柔抚拍，多带安慰、赞许或亲昵的意味。这里不比较 tap 的其他义项，如“利用”或“窃听”。

Compared meaning: a light touch (noun).

比较义项：轻拍/轻触（名词）。

• tap 本词

  Tap suggests a quick, light knock or contact, often making a soft sound, used to get attention or check something, rather than an affectionate touch with the hand.

  tap 表示快速轻微的叩击或接触，常常发出轻响，用于引起注意或试探（例如敲门），而不是用手表达关爱的触摸。

  There was a soft tap at the door before it opened.

  门上传来轻轻的一声叩击，随后门开了。

• pat

  Pat specifically means a light touch with the flat of the hand, often gentle and affectionate or reassuring, as when comforting a person or animal.

  pat 特指用手掌轻柔地拍打，常带有关爱、安慰或鼓励的意味，比如安抚一个人或一只动物。

  She gave the dog a gentle pat on its head.

  她轻轻拍了拍狗的头。

• dab

  Dab refers to a light touch that applies a small amount of a substance, such as paint or cream, to a surface, rather than a knock or an affectionate touch.

  dab 指轻轻一触，将少量物质（如颜料或药膏）涂抹到表面上，而不是叩击声或充满关爱的触碰。

  She applied a dab of paint to cover the tiny scratch.

  她涂了一点颜料来遮盖那道小划痕。

Tap, pat, and dab all name a light touch. Tap suggests a quick, light knock, used to get attention, not affectionate. Pat means a light touch with the flat hand, gentle or reassuring. Dab means a light touch that applies a small amount of paint.

这三个词都表示轻柔的触碰，但方式和含义不同：tap强调用手指、指关节或物体发出的轻快叩击（常有轻响），多用于敲门或引起注意；pat特指用手掌轻柔地拍打，常带有关爱、安慰或鼓励的意味；dab则指轻轻一点的接触，常用于把少量物质（如颜料、药膏）涂抹到表面上。这里不比较tap作为“水龙头”的义项，也不比较pat和dab作为动词“轻拍/轻触”的用法。