Rails makes setting up the base directory structure for your project very easy. Run the rails command to create all of the necessary starter files.

通过Rails可以非常方便地设置项目的基本目录结构。

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You'd start by setting up your transit (a telescope that rotates on a calibrated base) and taking a sight on the object.

你一开始先设置你的经纬仪（一个在校准的基座上旋转的望远镜），观测该物体。

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