true time的用法和樣例：
例句
- A transition is only performed when its associated condition is true.
轉移只在其相關聯的條件為真時才執行。 - Inventors created sundials, which indicate time by the length or direction of the sun's shadow, to track temporal hours during the day.
當時的發明家製造了日晷，利用太陽陰影的長度或角度，來測量白天真時的變化。
