次声

Based on single beam echo sounder, the MES was developed in the seventies of the twentieth century. Using the equipment, in the profile formed by samples within a ping, about more than one hundred depth datum and more than one thousand backscatter samples are observed.

20世纪70年代出现的多波束测深系统，是在单波束回声测深系统的基础上发展起来的，它能够在测量断面内，一次给出几十个甚至上百个深度点，几百个甚至上千个声强采样数据，对测量区域实施全覆盖式测量。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。