unbiased sample

基本解释

First, we needed a representative, unbiased sample of news stories, so we bought every one of the top 10 bestselling UK newspapers, every day for one week.
首先我们需要一个具有代表性，并且公正的新闻报道样本，所以我们持续一个星期每天购买英国前10名最畅销的报纸。
To find out, you'd have to take a systematic and unbiased sample – perhaps a whole week's worth of stories – and then check the evidence behind every claim.
为了找到答案，你就必须采取系统和公正的样本——也许是值得花一整个星期去探究的案例——然后去查每一项主张后的证据。
With a pristine and unbiased sample of interstellar dust they can truly find out if and by how much the elements of our own world differ from others throughout the galaxy.
通过这些原始的无偏见的星际尘埃样品，人们能真正找出究竟我们的太阳系同银河中的其它星球是否有元素差异以及相差多少。