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open sea ['əupən'si:]
bridg.constr.	开阔海
environ.	公〔大〕海
hydroel.st.	公海; 外海
oil	广海; 开敞海域
tech.	开阔海 (面); 开敞海面; 大海; 敞海
open sea The high seas lying outside the exclusive economic zones of states. All states have equal rights to navigate, to overfly, to lay submarine cables, to construct artificial islands, to fish, and to conduct scientific research within the high seas ['əupən'si:]
environ.	公海 (超出了国家专属经济区的外海。所有国家都有平等的权利去航行、飞越、铺设海底电缆、建设人工岛屿、捕鱼，并可在公海进行科研。)
open seas
tech.	公海

open sea : 34 phrases in 10 subjects

Automobiles	1
Business	1
Earth sciences	2
Environment	1
Hydroelectric power stations	3
International trade	1
Name of organization	1
Oil / petroleum	1
Technology	22
Water resources	1