But the studies they found are a very mixed bag, and although the researchers have done a great job of summarising this material, their findings gloss over very serious methodological problems.

• 但是他们的研究结果却各不相同，尽管研究人员在归纳总结这些材料方面做了大量的工作，但是他们的发现还是掩盖了很严重的方法问题。