The filter will retain all the impurities, leaving only a gold (III) chloride solution.
所有的杂质都会留在滤纸上，而三氯化金则可以顺利通过滤纸。
2
Now, all we need to do is filter everything once again. The filter will retain all the impurities, leaving only a gold (III) chloride solution.
现在我们要做的就是把所有的东西再过滤一遍。所有的杂质都会留在滤纸上，而三氯化金则可以顺利通过滤纸。
3
The input (record) is filtered by the application of an optimum bilateral exponential filter, and the output model of gold signal for each line is produced.