1) ceaselessly come and go
往返奔波
2) round travelling time of reflection wave
反射波往返时
1.
Based on the basic principle of reflection and transmission in the process of the propagation of logitudinal wave, this paper recounts a new theory and method for the application of pile body completeness inspection data with reflection wave method to the quantitative determination of apparent reflection coefficients and the round travelling time of reflection wave.
从纵波传播过程的反射和透射的基本原理出发，介绍了反射波法桩身完整性检测数据在频率域中定量确定视反射系数和反射波往返时间的一种新的理论和方法。
3) reflection time of pressure wave
压力波往返时间
5) reciprocation
[英][ri,siprə'keiʃən] [美][rɪ,sɪprə'keʃən]
往复，往返
补充资料：往返
①来回；来去：徒劳往返｜往返十多里路｜樵风往返吹。②来往；交往：书信往返｜应酬往返。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条