So, in this case, it's just a " sodium ion" .

所以，在这种情况下， 它只是一个“钠离子” 。

Inside the cell membrane is a sodium potassium pump that needs ATP in order to pump sodium out of the cell and potassium inside.

细胞膜内的钠钾泵需要ATP供能，来把钠泵出细胞外，把钾泵入细胞内。

As mentioned earlier, a sodium intake of 3 to 6 grams (about 7 to 15 grams of salt) seems to be an ideal range for most people.

如前所述，钠摄入量为 3 至 6 克（约 7 至 15 克盐）似乎是大多数人的最佳摄入量。

It’s also designed to be a reversible contraceptive, so scientists can theoretically break down the gel and flush it out with a second injection of a sodium bicarbonate solution.

它还被设计成一种可逆的避孕药，因此科学家们理论上可以分解凝胶并通过第二次注射碳酸氢钠溶液将其冲洗掉。

By examining sunlight and a sodium flame at the same time, Kirchhoff and Bunsen were able to show that the bright lines emitted by burning sodium fit like puzzle pieces with certain dark lines missing from Fraunhofer's rainbow.

通过同时检查阳光和钠火焰，基尔霍夫和本森能够证明钠燃烧发出的明亮线条就像拼图一样吻合，而弗劳恩霍夫的彩虹中缺少某些黑线。