eternal

1. eternal fire 长明灯(坟前的灯).

eternal 永久的

来自拉丁语aeviternus, 永久，永恒。来自词根ev, 长久，时期，词源同eon, longevity.

eternal

eternal: [14] Something that is eternal lasts literally for ‘aeons’. The word comes via Old French eternal from aeternālis, a late Latin development of the Latin adjective aeternus ‘eternal’. This in turn was a derivative of aevum ‘age’ (which crops up in English medieval, primeval, etc), a relative of Greek aión ‘age’ (from which English gets aeon) and archaic English aye ‘ever’.
=> aeon, aye, ever

eternal (adj.)

late 14c., from Old French eternel "eternal," or directly from Late Latin aeternalis, from Latin aeternus "of an age, lasting, enduring, permanent, everlasting, endless," contraction of aeviternus "of great age," from aevum "age" (see eon). Used since Middle English both of things or conditions without beginning or end and things with a beginning only but no end. A parallel form, Middle English eterne, is from Old French eterne (cognate with Spanish eterno), directly from Latin aeternus. Related: Eternally. The Eternal (n.) for "God" is attested from 1580s.

1. The series chronicles the everyday adventures of two eternal bachelors.

这个系列剧按照时间顺序记述了两个老光棍每天的奇遇。

2. In the background was that eternal hum.

背景音是没完没了的嗡嗡声。

3. the promise of eternal life in heaven

在天国永生的许诺

4. the eternal verities of life

生命永恒的真理

5. The principles of the Paris Commune radiates with eternal light.

巴黎公社的原则闪耀着不灭的光辉.

【permanent, eternal, perpetual, everlasting, endless】
这些形容词均有“持久的，永久的”之意。
permanent: 指总是处于相同的情况和地位，可长期持续下去，永久不变。
eternal: 语体较庄重，侧重指永远存在，无始无终。
perpetual: 语气最强，指保持永久不变，没有中断的行为，永无止境地持续下去。有时用于贬义，指令人厌烦之事。
everlasting: 语气较庄重，有时可与eternal换用，侧重持续不尽，或指开始后一直进行下去。
endless: 系日常用词，指无尽无休。