parallel

n. 平行线；对比

vt. 使…与…平行

adj. 平行的；类似的，相同的

中文词源

parallel 平行的，并列的

来自希腊语parallelos,并列，平行，para-,在旁，在周围，-allel,改变，另外的，词源同else,alternate.即在旁边的另外一条，引申词义平行的，并列的。

parallel: parallel: [16] Etymologically, parallel simply means ‘beside each other’. It comes via French parallèle and Latin parallēlus from Greek parállēlos. This was a compound formed from pará ‘beside’ and allélōn ‘each other’, a derivative of állos ‘other’ (to which English else is distantly related).
=> else
parallel (adj.): 1540s, from Middle French parallèle (16c.) and directly from Latin parallelus, from Greek parallelos "parallel," from para allelois "beside one another," from para- "beside" (see para- (1)) + allelois "each other," from allos "other" (see alias (adv.)). As a noun from 1550s. Parallel bars as gymnastics apparatus are recorded from 1868.
parallel (v.): 1590s, from parallel (n.).

1、par- / para- "beside" + allel-.2、字面意思就是：beside one another.

1. Parallel lines will never meet no matter how far extended.: 无论延伸多长，平行线永不相交。

2. Farthing Lane's just above the High Street and parallel with it.: 法辛巷刚好在大街的北面，与大街平行。

5. It's an ecological disaster with no parallel anywhere else in the world.: 这是一场在世界其他地方都没有出现过的生态灾难。