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river water
hydroel.st.	河水
tech.	河水 (流)
river water Water which flows in a channel from high ground to low ground and ultimately to a lake or the sea, except in a desert area where it may dwindle away to nothing
environ.	河水 (水流，在河道里从高处流向低处的河或海，但在沙漠中会逐渐减少到没有。)

river water: 145 phrases in 12 subjects

Agriculture	4
Commerce	1
Desert science	2
Ecology	6
Electronics	1
Engineering geology	2
Environment	2
Hydroelectric power stations	3
Nautical	1
Technology	100
United Nations	2
Water resources	21