来自拉丁语 scandere,攀爬，攀登，来自 PIE*skand,爬，跳，词源同 ascend,descend.字母 d 脱 落，比较 lawn,land.引申词义标出诗歌的韵律，即标出诗歌的抑扬顿挫，并进一步引申词义 仔细看，检查，察看，浏览，后用于指扫描，且成为主要词义。
英文词源
scan
scan: [14] Latin scandere meant ‘climb’ (it has given English ascend and descend). In the postclassical period it was used metaphorically for ‘analyse the rising and falling rhythm of poetry’, and it was in this sense that it passed into English as scan. It was broadened out semantically to ‘examine’ in the 16th century, and to ‘look at widely’ in the 18th century. The Latin past participle scansus formed the basis of the noun scansiō, from which English gets scansion [17]. => ascend, descend, scandal
scan (v.)
late 14c., "mark off verse in metric feet," from Late Latin scandere "to scan verse," originally, in classical Latin, "to climb, rise, mount" (the connecting notion is of the rising and falling rhythm of poetry), from PIE *skand- "to spring, leap, climb" (cognates: Sanskrit skandati "hastens, leaps, jumps;" Greek skandalon "stumbling block;" Middle Irish sescaind "he sprang, jumped," sceinm "a bound, jump").
Missing -d in English is probably from confusion with suffix -ed (see lawn (n.1)). Sense of "look at closely, examine minutely (as one does when counting metrical feet in poetry)" first recorded 1540s. The (opposite) sense of "look over quickly, skim" is first attested 1926. Related: Scanned; scanning.
scan (n.)
1706, "close investigation," from scan (v.). Meaning "act of scanning" is from 1937; sense of "image obtained by scanning" is from 1953.
双语例句
1. I just had a quick scan through your book again.
我只是又快速浏览了一遍你的书。
来自柯林斯例句
2. He was rushed to hospital for a brain scan.
他被火速送往医院做脑部扫描。
来自柯林斯例句
3. Their approach is to scan every checked-in bag with a bomb detector.
他们的方法是用炸弹探测器对每一个办理了登机手续的箱包进行扫描。
来自柯林斯例句
4. I had an ultrasound scan to see how the pregnancy was progressing.
我进行了超声波检查，看看妊娠情况如何。
来自柯林斯例句
5. A brain scan last Friday finally set his mind at rest.