upwellingsCOCA¹²⁹⁷⁷³BNC²³⁶²¹³⁺¹Economist⁵³⁵⁸¹⁺¹ 基本例句 n.上涌;上升流指海水由较深层上升到较浅层的过程原型upwelling的复数 Some areas of the deep sea are vulnerable frequent natural disturbances taking the form of intense currents, mud slumps, low oxygen, and upwellings. 深海的一些地方,常常受到自然干扰,这些干扰以急流、泥浆、低氧和上升流的形式存在。 zhksw