coalescence time

例句：

1. 1. The coalescence time of the two planets is crucial for predicting their future movements.
   两个行星的聚合时间对于预测它们的未来运动至关重要。
2. 2.The research team found that the coalescence time of the two stars was exactly when they were closest.
   研究小组发现，两颗恒星的聚合时间正好是它们距离最近的时候。
3. 3.The scientists used a special technique to measure the coalescence time of the two black holes.
   科学家们使用了一种特殊技术来测量两颗黑洞的聚合时间。