duration of down time 中文意思是什麼
duration of down time
解釋
停機持續時間-
Put down the name of the observer, the place and time of observation, duration of observation, cloud cover, the sky s limiting magnitude the magnitude of the faintest star you can see with the naked eye and the number of meteors observed on the data sheet
流星雨的觀測資料,只要清楚註明觀測者姓名觀測地點觀測時間觀測長度雲量最暗可見星等及流星數目,便已經是一份十分有科學價值的觀測記錄了,很簡單,對嗎?
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