reference coordinate system的用法和樣例：
例句
- In a reference frame attached to the flame front, the flame spreading rate becomes an eigenvalue for the flame spreading over a rod fuel.
當參考坐標系團結在火焰前鋒上時，該火焰傳播問題成為一準穩態問題，燃料以一固定速度供給火焰。 - Two events that occur at the same moment if observed from one reference frame may occur at different moments if viewed from another.
從某個參考坐標系來看，同時發生的兩個事件，對於另一坐標系而言，可能就發生於不同的時刻。
