"Whole foods are always the best option rather than adding supplements," he says, noting the FDA does not regulate supplements as rigorously as foods or drugs.
2019年12月六级真题(第二套)阅读 Section B
Problems surround the use of machines to spot deception, at least until it has been rigorously tested.
2018年12月六级真题(第一套)听力 Section C
柯林斯高阶英汉双解学习词典释义
ADJ-GRADED
(测试、系统或程序)严格的,严密的,缜密的
A test, system, or procedure that is rigorous is very thorough and strict.