yank

Compared meaning: pull suddenly and hard (verb).

比较义项：猛地拉动（动词）。

• jerk

  Emphasizes a sudden, sharp, jolting motion; can describe any abrupt movement (pulling, pushing, jolting) and is often used of body parts moving involuntarily.

  强调突然、急促、颠簸式的动作；可以描述任何突然的动作（拉、推、抖动），常用于身体部位不由自主地动一下。

  He jerked his hand back when the pan touched his skin.

  锅碰到他皮肤的瞬间，他猛地把手缩了回去。

• yank 本词

  More informal and specifically means to pull something hard and suddenly, usually to remove or free it; almost always used with a direct object being pulled.

  更口语化，特指用力猛拉某物，通常是为了把它拉出来或弄松；几乎总是带有一个被拉动的直接宾语。

  She yanked the stuck drawer until it finally came open.

  她使劲猛拉卡住的抽屉，直到它终于被拉开。

Both mean to pull suddenly with force, but jerk is broader. Jerk describes any sudden, sharp, jolting motion, including body parts moving on their own. Yank is more informal and means pulling something hard and suddenly, usually to remove or free it.

两词都表示突然用力拉扯的动作，但 jerk 强调动作的突然、猛烈，可以泛指任何突然的猛拉、猛推或猛动；yank 更强调用力把东西一下子拉出来或拉动。这里不比较 jerk 表示“混蛋、讨厌鬼”的名词义。