a.d.中文什么意思

'd: 〔口語(yǔ)〕 1.＝ had: I'd ... ＝ I had .... 2.＝ did: Where'd ... ＝ Where did .... 3.＝ should (或 would): He'd ... ＝ He should (或 would). 4.＝-ed: foster'd.
a and d: 入院和出院
a d: disk]重折光盤(pán); 放棄的; 是一組對(duì)立項(xiàng); 重折光盤(pán),暗帶
d: D flat 【音樂(lè)】降 D 調(diào)。 D major [minor] 【音樂(lè)】 D 大調(diào)[小調(diào)]。 D sharp 【音樂(lè)】升 D 調(diào)。 a D student 劣等生。 a D slide valve D 形滑閥。 CD ＝ 400. DC ＝ 600.
d and: dd and d, d & d＝〔美俚〕1.drunk and disorderly (警察用語(yǔ))酒醉后擾亂治安的。2.deaf and dumb 又聾又啞的；〔比喻〕裝聾作啞的(尤指因?yàn)榕聢?bào)復(fù)而對(duì)壞事不加告發(fā))。; 儀器公司

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the period during which the romans figured in history extends from about 750 b.c. to a.d. 476 .
羅馬人活躍于歷史舞臺(tái)上的時(shí)期大約是從公元前750年到公元476年。
the vandals took rome in 477 a.d. and stole its treasures, but didn't damage its works of arts .
汪達(dá)爾人在公元477年攻占了羅馬，盜走了羅馬城的珍寶，但沒(méi)有損壞它的藝術(shù)品。
it was clear from the accounts of the historian pliny(23-79 a.d. )that the romans also possessed burning-glasses .
從歷史學(xué)家普林尼（公元23-79年）的記述中清楚知道羅馬人也有點(diǎn)火鏡。
the seismograph invented in 132 a.d. by zhang heng, chinese scientist of the east han dynasty ( 25 a.d.-220 a.d. ), was the first seismograph in the world .
中國(guó)東漢科學(xué)家張衡于公元132年發(fā)明的地動(dòng)儀是世界上最早的地震儀。
the seismograph invented in 132 a.d. by zhang heng, chinese scientist of the east han dynasty ( 25 a.d.-220 a.d. ), was the first seismograph in the world .
中國(guó)東漢科學(xué)家張衡于公元132年發(fā)明的地動(dòng)儀是世界上最早的地震儀。