Application of over-segmentation algorithm is enough to make the results useless.

过度分割足以令应用算法得到的结果变得毫无用处。

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Choosing a line width that is too small results in the lines not being visible at all, and a line width too large renders the output useless because the lines cover all geometries.

线宽太小会导致线条完全不可见，太大则会导致显示没有用的输出，因为线条覆盖了所有的几何图形。

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The problem was that most Internet searches produced useless lists of low-quality results.

那时互联网搜索的结果总是差强人意。

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But the results would surely be a mixed bag: some good, some useless and some terrible.

FORBES: State Health Care Flexibility: The Good, the Bad and the Broke