Update dataset.md

Removed 2 Chinese full stop characters in the JavaScript comments. The "previous case" of the "Map from Data to Chart" chapter isn't as it describes, it should be corrected as "next case".

contents/en/concepts/dataset.md

@@ -160,7 +160,7 @@ The effect of configuration is shown in [this case](${exampleEditorPath}dataset-
 
 Most of the data described in commonly used charts is a "two-dimensional table" structure, in the previous case, we use a 2D array to contain a two-dimensional table. Now, when we map a series to a column, that column was called a "dimension" and each row was called "item", vice versa.
 
-The dimension can have their name to display in the chart. Dimension name can be defined in the first column (row). In the previous case, `'score'`, `'amount'`, `'product'` are the name of dimensions. The actual data locate from the second row. ECharts will automatically check if the first column (row) contained dimension name in `dataset.source`. You can also use `dataset.sourceHeader: true` to declare that the first column (row) represents the dimension name.
+The dimension can have their name to display in the chart. Dimension name can be defined in the first column (row). In the [next case](#map-from-data-to-charts-(series.encode)), `'score'`, `'amount'`, `'product'` are the name of dimensions. The actual data locate from the second row. ECharts will automatically check if the first column (row) contained dimension name in `dataset.source`. You can also use `dataset.sourceHeader: true` to declare that the first column (row) represents the dimension name.
 
 Try to use single `dataset.dimensions` or some `series.dimensions` to define the dimensions, therefore you can specify the name and type together.
 
@@ -169,7 +169,7 @@ var option1 = {
   dataset: {
     dimensions: [
       { name: 'score' },
-      // can be abbreviated as 'string', to indicate dimension name 。
+      // can be abbreviated as 'string', to indicate dimension name
       'amount',
       // Specify dimensions in 'type'.
       { name: 'product', type: 'ordinal' }
@@ -478,7 +478,7 @@ var option = {
       source: []
     },
     {
-      // 3rd Dataset。
+      // 3rd Dataset
       source: []
     }
   ],