If you have the choice between separating two design segments by a visible line or by some whitespace, it's usually better to use the whitespace solution.
如果有两种选择,一是用明显的竖线将两个区域隔开,另一个是使用一些空白达到这种效果,通常比较好的选择是后者,即留出空白。
Assume your normal golf stance facing a visible line parallel to your feet, if possible.
假定一个常规的击球初始姿势,如果可能的话在面前画一条可见的与双脚平行的线。
Also, the tree's header must be set as visible (line 21) for the column's headers to display.
而且,树的标题必须设置为可视的(第21行),以显示列的标题。
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