We believe these strong discontinuities indicate a sample bias, perhaps as a result of instrument characteristics.
我们相信，这些非常明显的不连续表明存在取样偏差，也许要归因于工具特性。
Thirdly is the sample representative or is there a bias in it due to whatever.
再次，样本有代表性吗,或者其中有偏见吗？
Not only does this restrict the sample size, it also introduces an obvious source of bias.
这不仅限制了样本容量，也引入了明显的偏差来源。
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