总含盐量，天然水中一般含有可溶性物质和悬浮物质（包括悬浮物、颗粒物、水生生物等）。
对海洋年龄的估计是通过以海洋中的总含盐量除以每年盐的增长率得出的。
An estimate of the age of the ocean was obtained by diving the total salt in the ocean by the rate of salt added each year.
去年，早餐麦片的含盐量只是平均购物篮中所买食物总含盐量的2.7%，低于牛奶(4.8%)、新鲜肉类(6.2%)及面包(9%)。
Last year, breakfast cereal was only 2.7% of the salt in the average shopping basket, lower than milk (4.8%), fresh meat (6.2%) and bread (9%).
美国人摄入了更多热量，他们或许会放弃一些含盐量更高的食品，好让总食盐消耗量维持正常水平。
As Americans ate more calories, they could have eased up on some of the saltier choices so that their overall sodium consumption remained constant.
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