问题描述：
英语翻译
even before
下面句子中In countries where there is a large frontier,such as Canada and Brazil,air service access to some areas even before they are reached by roads.
even before是什么用法啊 要睡觉了
even before
下面句子中In countries where there is a large frontier,such as Canada and Brazil,air service access to some areas even before they are reached by roads.
even before是什么用法啊 要睡觉了
问题解答：
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