Selecting the primary option installs a primary node and creates a cluster.
选择主选项会安装一个主节点并创建一个集群。
At present, a tunnel scheme has become a primary option of a long-distance oil-gas pipeline through mountains.
目前，隧道方案已经成为长距离油气管道通过山区的一个主选方案。
At present, a tunnel scheme has become a primary option of a long-distance oil-gas pipeline through mountains.
目前，隧道方案已经成为长距离油气管道通过山区的一个主选方案。
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