Saccade

[sæ'kɑ:d]

(noun.) a rapid, jerky movement of the eyes between positions of rest.

克林顿编辑--From WordNet

(n.) A sudden, violent check of a horse by drawing or twitching the reins on a sudden and with one pull.

阿加莎手打

n. a violent twitch of a horse by one pull: a firm pressure of the bow on the violin-strings so that two are sounded at once.

柏妮丝手打