虽然人类喜欢替所有活动之物都插上标签(亚当开的头)，可是起名一事本身却绝然轻易不得。

Despite a human fondness for sticking labels on all that moves (Adam started it), this is not a task to be entered into lightly.

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它的头两行定义了一个按钮和一个标签。

It defines a button and a label in the first two lines.

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列表2 .为这些标签核查现有文件中的头内容。

Listing 2. Check head content of the existing file for these tags.

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