Glossary term: 時區
Description: 時區是指使用統一標準時間的一個區域。我們對時間的度量與地球自轉有關。特別是正午時刻，與太陽在天空中的最高位置有關。當地正午時間在很大程度上取決於經度：位於東邊的觀察者會比西邊的觀察者更早看到太陽升起並到達正午。位於同一經度的所有地點都有相同的當地正午時刻，因此原則上，我們可以為所有這些地點定義一個共同的時間標準。實際上，統一時間是為一定經度範圍、一個國家或一個國家的一個地區定義的。對於大多數地點而言，當地正午接近該時區的官方正午，但略早於或略晚。在這種情況下，官方時間的差異幾乎總是整數小時（儘管有些特定的時區偏離了這一情況，例如相差半小時）。
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Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher The translation of this term and its definition is still awaiting approval
This is an automated transliteration of the simplified Chinese translation of this term
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