但通常不这样做，传入DOM文档元素，然后从这里开始编写表达式是最简单的办法。
More often than not, though, it's easiest to pass in the DOM document element and write your expressions from there.
但通常不这样做，传入DOM文档元素，然后从这里开始编写表达式是最简单的办法。
More often than not, though, it's easiest to pass in the DOM document element and write your expressions from there.
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