1. A map showing the variation in the difference of the two-way travel times between two seismic reflection events.
2. A map of two-way travel times to the same reflector event marked by isochrons (lines of equal travel time).
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。