Become familiar with the three basic endpoint scenarios that you might face. I'll detail them briefly here, and then drill down into each in the rest of this article.

要熟悉您可能面对的三种基本场景，我首先简要地介绍一下这三种场景，然后再详细地对它们展开讨论。

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In most cases, the face of the drill-and-blast excavation was originally fairly dry.

在许多情况下，操练和疾风挖掘的面孔最初是相当干燥的。

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In most cases, the face of the drill-and-blast excavation was originally fairly dry.

在许多情况下，操练和疾风挖掘的面孔最初是相当干燥的。

youdao