first arrival

• 初至

first arrival的用法和样例：

例句

1. The tomographic inversion of the surface layer velocity model with the first break is the important base of the tomographic static correction.
   初至波表层速度模型层析反演是层析静校正的重要基础。
2. This problem was effectively solved by using nonlinear first break tomography inversion static method to take the place of the small refraction and uphole.
   为此，用非线性初至波层析反演静校正方法替代小折射和微测井技术，有效地解决了长波长静校正问题。