Researchers at Duke University scrutinized more than 160 published studies and found an absence of strong evidence that any of these approaches can make a big difference.
出自-2016年6月听力原文
柯林斯高阶英汉双解学习词典释义
VERB
详细检查;仔细察看
If you scrutinize something, you examine it very carefully, often to find out some information from it or about it.