block number的用法和樣例：
例句
- You can choose whether this tree view is collapsed or expanded by default and the number of groups to display on each page.
可以選擇默認情況下此樹視圖是摺疊還是展開以及每頁所顯示的組數。 - So having said this, when you increase your weight then decrease the number of reps, but not the number of sets.
因此話講到這邊，你應該知道當你增加重量的時候，要減少次數，但不用減少組數。
