热热热久久久免费视频|第四色五月婷婷五月天AV|日韩高清无码免费一级大片|日本成人手机在线视频|中文字幕无码Av在线|台湾a级别黄片免费看|欧美一级性爱亚洲第一性爱|A级黄色电影久草大|www.91精品视频|亚洲AV资源欧洲无码在线观

單詞乎

parsec

音標(biāo)['pɑ:sek]
parsec是什么意思、parsec怎么讀

parsec漢語翻譯

n. 秒差距(天體距離單位)

parsec英語解釋

名詞 parsec:

  1. 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
    同義詞:secpar

parsec詳細(xì)解釋

par.sec

n.(名詞)
A unit of astronomical length based on the distance from Earth at which stellar parallax is one second of arc and equal to 3.258 light-years, 3.08'×03 kilometers, or .98 × 0 3 miles.
秒差距:天文學(xué)自地球起的距離單位,星視差為角秒,等于3.258光年,3.08'×03公里,或.98×0 3英里

來源:
par(allax)
par(allax)
sec(ond)
sec(ond)

0
糾錯(cuò)