| 正面 | 7838.periodic 英 [,pɪərɪ'ɒdɪk]美 [,pɪrɪ'ɑdɪk]     |
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| 背面 |     释义： 1. or- "out" + deal => literally "deal out, share out".2. literally "that which is dealt out" (by the gods).3. The prefix or- survives in English only in this word, but was common in Old English and other Germanic languages and originally was an adverb and preposition meaning "out".4. 谐音“奥迪哦、熬弟哦”——想获得奥迪就要经受严峻的考验5. deal => dole, ordeal.adj. 周期的；定期的 例句： 1. There may be periodic police "sweeps" of crime in the area.警方可能对该地区的犯罪活动进行定时的“扫荡”。 periodic 周期性的来自period,周期，时期。 periodic (adj.)1640s, from French périodique (14c.), from Latin periodicus, from periodus (see period). Periodic table in chemistry (1889) is from notion of the arrangement, in which similar properties recur at intervals in elements in the same area as you read down the rows of the table. This sense of the word is attested from 1872 (periodic law)." |