We can examine this by using the Firebug plug-in for Firefox, as shown in Figure 2.

可以使用Firebugplug-infor Firefox来检查这种区别，如图 2 所示。

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We can examine this by using the Firebug plug-in for Firefox, as shown in Figure 2.

可以使用Firebugplug-infor Firefox来检查这种区别，如图 2 所示。

youdao