| 正面 | 5402.underground 英 [ʌndə'graʊnd]美 [,ʌndə'ɡraʊnd]     |
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| 背面 |      释义： 1、ortho- "right, true, correct" + dox-.adv. 在地下；秘密地adj. 地下的；秘密的；先锋派的n. 地下；地铁；地道；地下组织；秘密活动；先锋派团体 例句： 1. Solid low-level waste will be disposed of deep underground.放射性水平低的固体废料将做地下深埋处理。 underground (adv.)1570s, "below the surface," from under + ground (n.). As an adjective, attested from c. 1600; figurative sense of "hidden, secret" is attested from 1630s; adjectival meaning "subculture" is from 1953, from adjectival use in reference to World War II resistance movements against German occupation, on analogy of the dominant culture and the Nazis. Noun sense of "underground railway" is from 1887 (shortened from phrase underground railway, itself attested from 1834)." |