1. 名詞
   datum複數: 基準, 基準面
   基點, 基線
   基面
   (數理上用來計算或測量的)已知數
   

   同義字詞
   detail,fact,nicety,particular,particularity,point,specific
   

例句

1. Work on these new datums is well underway.
2. Your explanation of vertical datums was helpful.
3. New U.S. datums by the end of the decade Table 1.
4. Datums are the basis for all geodetic survey work.
5. These datums are compatible with GNSS technologies.
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