寫法一：div#container {height: 35px;}寫法二：#container {height: 35px;}寫法一：.Grid-cell.u-full {flex: 0 0 100%;}寫法二：.u-full {flex: 0 0 100%;}
這兩種css選擇器的寫法有何區(qū)別？
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2016-11-05 11:05:59
