| 单词 | Second |
| 释义 | 秒 1. Symbol - ” A non-SI (or non-International System of Units) unit for measuring plain angles; the value in SI units being (π/648000) rad: Metrication Ordinance (Cap 214) sch 2. 2. Abbr – s or sec The basic SI (or non-International System of Units) unit for measuring time and also SI units of measurement of intervals of time. It refers to the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom: Metrication Ordinance (Cap 214) sch 1. See also Degree. 1. 符號 - 〃 用以量度平面角的非SI (或非國際單位制) 單位；在SI的單位值為(ð /648000) rad：《十進制條例》（第214章）附表2。 2. 縮寫 - s或 sec 用以計算時間的基本SI (或國際單位制) 單位及計算時間長度的SI單位。指與銫-133原子基態的兩個超精細能級間躍遷對應的輻射的9192631770個周期的持續時間：《十進制條例》（第214章）附表1。另見 Degree。n. |
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