slap

Compared meaning: hit or strike something (slap = noun here).

比较义项：击打、敲打（knock、strike、beat 为动词，slap 在此为名词，指拍打的动作）。

• knock

  Knock means to hit a surface firmly, usually to get attention, as with a fist on a door; it does not imply great force or repeated impact like beat, or hitting a person like strike or slap.

  knock 指用力敲击某个表面（如用拳头敲门）以引起注意，力度不大，也不像 beat 那样反复击打，也不像 strike 或 slap 那样打人。

  Someone knocked on the door while we were eating dinner.

  我们吃晚饭时，有人敲了敲门。

• strike

  Strike stresses a single, sudden, forceful blow, often to a person, object or weapon; it sounds more formal or dramatic than knock, and unlike beat, it does not suggest repeated hits.

  strike 强调突然而有力的一击，常用于打人、物体或武器，语气比 knock 更正式、更有力，且不像 beat 那样表示反复击打。

  The boxer struck his opponent with a powerful right hook.

  那位拳击手用一记有力的右勾拳击中了对手。

• beat

  Beat highlights repeated hitting over time, as in beating a drum or beating someone violently; it implies more than one impact, unlike the single blows of strike, knock or slap.

  beat 强调持续、反复的击打，比如敲鼓或反复殴打某人，暗示不止一次的击打，不同于 strike、knock 或 slap 的单次一击。

  He beat the drum steadily throughout the whole song.

  他在整首歌里稳稳地反复敲鼓。

• slap 本词

  Slap is a noun for one quick hit given with the open hand, usually to a person's face or a small target; unlike the verbs knock, strike and beat, it names the act itself rather than a manner of hitting.

  slap 是名词，指用张开的手掌快速拍打一下，通常打在人的脸上或较小的目标上；与动词 knock、strike、beat 不同，它表示这一具体的拍打动作，而不是某种打的方式。

  He gave the mosquito a quick slap before it could bite him.

  在蚊子咬他之前，他很快地拍了它一下。

Knock, strike, beat, and slap all relate to hitting, but the manner differs. Knock means hitting a surface to get attention. Strike means a single, sudden, forceful blow. Beat means hitting repeatedly, as in beating a drum. Slap is a noun for one open-hand hit.

这四个词都可表示打或击，但方式和语气不同：knock 侧重敲击表面以引起注意，strike 侧重突然而有力的一击，beat 侧重反复击打，slap 则是名词，指用手掌快速拍打一下的动作。这里不比较 strike 的罢工义、beat 的打败对手或心跳义、knock 的口语批评义，以及 slap 作动词拍打的用法。