但是如果从融化的冰川和冰山上流下来的淡水进入了洋流，海水浓度就会逐渐降低，不会再沉到海底。
But if fresh water from melting glaciers and icebergs is added, the current's density is gradually reduced and it can't sink to the bottom.
高海水浓度培养条件下的HW—1的细胞生长没有密度依赖性，而低海水浓度(10%或更低)培养条件下的细胞生长具有一定的密度依赖性。
HW-1 cells from high seawater-containing medium grew independently of cell-density, while those from low-seawater media (10% or less) showed density-dependent growth.
它们允许一定量的盐分进入它们的细胞，将水中的盐分带进植物体内，并把其体内的盐含量提高到比周围海水稍高的浓度。
They allow a certain amount of salt to enter their cells, bringing the salt content of the water within the plant, to a slightly higher concentration than that of the surrounding seawater.
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