首子午線 的英文怎麼說

中文拼音 [shǒuzixiàn]
首子午線 英文
basis meridian
  • : Ⅰ名詞1 (頭) head 2 (首領) leader; head; chief 3 (表示方位) aspect 4 (姓氏) a surname Ⅱ動...
  • : 子Ⅰ名詞1 (兒子) son 2 (人的通稱) person 3 (古代特指有學問的男人) ancient title of respect f...
  • : 名詞1 (地支的第七位) the seventh of the twelve earthly branches2 (日中的時候; 白天十二點) noo...
  • : 名詞1 (用絲、棉、金屬等製成的細長的東西) thread; string; wire 2 [數學] (一個點任意移動所構成的...
  1. The prime meridian, which runs through greenwich in south - east london, became the basis for the world ' s time keeping in 1884 after the first astronomer royal, john flamstead, calculated that the earth rotated on its axis once every 24 hours

    1884年,位皇家天文學家約翰法蘭姆斯坦算出地球每隔24小時繞軸自轉1次,使得通過倫敦東南格林威治的本初成為全球計時基準。
  2. In this paper, on basis of the current machining state, a testing principle on aspheric surface is put forward to, the principle is a kind of touching method by testing the meridian of aspheric surface and comparing it with the theoretical curve, so surface figure error is got. according to this principle, mechanical structure is designed and electric - control system is researched

    本文先基於現階段非球面的加工狀況,提出了用接觸式檢測非球面的面面形曲並與理論曲相比較,從而得到非球面面形誤差的檢測原理,並根據該原理進行了機械結構的總體設計和電控系統的研究。
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