现在一项研究发现，如果是晚上从奶牛身上挤的奶，确实能帮助人们打盹。
Now a study has found it really does help people nod off if it is milked from a cow at night.
2003年的一项研究发现，人力车夫的收入接近加尔各答的最底层，只比乞丐做得更好。
A 2003 study found that rickshaw pullers are near the bottom of Kolkata occupations in income, doing better than only the beggars.
最近的一项研究发现，即使没有科学证据表明食品有害，带有“不含”字样的标签也会使其污名化。
A recent study found that absence claims labels can create a stigma around foods even when there is no scientific evidence that they cause harm.
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