secpar是什么意思_secpar的用法_翻译_读音

- n. 秒差距(天文距离单位之一)
英英释义
Noun:

a unit of astronomical length based on the distance from Earth at which stellar parallax is 1 second of arc; equivalent to 3.262 light years
近反义词
【近义词】

parsec 表示天体间距离的单位...
临近单词

secy SEC Securities Trading System sec-butyl cyclohexanone securities and investment securities market opening sec.-butyl propionate securities payable market Securidaca inappendiculata securities in sinking fund securities clearing system sec-alkyl sodium sulfate