Secondly, the laser propagation rule in the underground air and error influencing factors of scanning point clouds were studied systematically.

第二，研究激光在井下空气中的传播规律及扫描点云数据的误差影响因素。

youdao

Through analysis and investigation, the author found out the operational rule of power supply system and based on the rule, a safe and reliable underground power supply system was set up.

通过分析、究，找出了其运行规律，在此基础上建立了安全可靠的井下供电系统。

youdao

Subjected to actual measure method and technical level, it is difficult to predict the distribution of sedimentary facies of underground strata by rule and line .

限于目前的测量手段和技术水平，要做好地下地层沉积相的预测是很难的。

youdao

And I've looked very carefully over the last few weeks at where we are with the London Underground and I'm very clear that we need to rule out privatisation of the London Underground.

BBC: News Online

Unfortunately, the consequence of the rule has forced runners to go underground while their power continues to be evident, and possibly growing with time.

FORBES: Despite NFLPA's Efforts, "Runners" Remain Powerful In Recruitment Of NFL Prospects

As a rule, economists are against rationing, as it distorts consumer choices, fosters underground markets, and nurtures corruption.

FORBES: Two Ways To Ease Gas Station Lines