盐碱地含有高浓度的氯化钠和其他盐类，限制了植物的生长，研究继续集中于开发耐盐的农作物品种。
Saline soils, which have high concentrations of sodium chloride and other salts, limit plant growth, and research continues to focus on developing salt-tolerant varieties of agricultural crops.
处理工艺结束后，离子被集中在管道的一半空间内，生成高浓度卤水，而淡水集聚在另一半空间内。
The result is that the ions concentrate in half of the channels, creating a strong brine, while fresher water accumulates in the other half.
他们从太平洋78处不同地点采集了2000多份淤泥样本，分析发现这些样本含稀土元素的浓度集中在400-2230ppm之间。
They analyzed more than 2, 000 mud samples taken from 78 locations in the Pacific.
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