soundings

They were sounding the river.

他们在探测河水深度。

Just as smooth and real sounding as the tube gear, but with better focus and overall tidier presentation.

非常柔细如胆机但更好刻画力与全面还原力。

It's a mean of geotechnical investigation, including borehole surveying, costeaning, trenching exploration, test pitting, hole exploration, geophysical exploration and penetration sounding.

岩种手段，包括钻探、井探、槽探、坑探、洞探以及物探、触探等。

The relationship between arctic tropopause height and surface air temperature is discussed by using the aerological sounding and surface data during 1977-1990 in Beijing area.

利用北京地区1977—1990年高空、地面资料，讨论了极地对流层顶与地面温度关系。