接下来，如果回到实际的氯化钠晶体中，你们做同样的计算，但是是在三维中。
And then, if you go the real sodium chloride crystal and you do this same calculation but in three-dimensions.
如果波美浓度太低，则可加入高浓度的三氯化铁溶液。
If Baume concentration is too low, you can add high concentrations of ferric chloride solution.
三氯化铁溶液不断地冲刷不锈钢板的表面，溶液中的三价铁离子快速氧化不锈钢板，不锈钢板就被蚀刻下去了。
Ferric chloride solution constantly scouring the surface of stainless steel plate, the solution of ferric ion rapidly oxidized stainless steel plate, stainless steel plate was etched on the go.
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