acoustic ray trace indicator的用法和样例：
- Acoustic Ray Tracing in Two-dimensional Temperature Gradient Field by Deploying Triangles
- Especially your acoustic ray suffices the words which attracts, the opposite sex mutual attraction can have an effect naturally.
- According to the ray trace principle, multiple reflectance between the earth’s albedo surface and the atmosphere was also taken into account.
- Ray tracing now seems set to leap the speed barrier, however.