You must verify whether the column selected to be sorted is the immediately preceding column to have been sorted and, if it is, in which direction (ascending or descending) it was previously sorted.

您必须检查要排序的选定列是否刚好在已排序的列的前面，如果是这样，还需要确定已经排序的列的排序方向(升序或降序)。

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As the selected ions moved in one direction, electrons (which are negatively charged) flowed in the opposite direction.

通过这种有选择性的离子使其向一个方向移动，电子(在阴极产生)则向相反的方向流动。

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The query consists of the relationships, plus the direction and the depth that you have selected.

这个查询系统包括相互之间的关系，加上您所选择的查询方向和深度。

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Tom Baldwin, Ed Miliband's spin-doctor purposely selected from the Murdoch empire to hone Labour's message in the direction of Wapping, warned Labour "not to conflate phone-hacking and BSkyB".

BBC: Murdoch: the network defeats the hierarchy