经历了彻底的

nitro radical───硝基自由基

nitroso radical───亚硝基自由基

arseno radical───偶砷基

benzoyl radical───苯甲醯基自由基

free radical───[物化]自由基；[物化]游离基

hydroxyl radical───[有化]羟基

underground railway───地铁

Riboflavin undergoes photo decomposition with resulting production of free radical containing products.───核黄素，经光解作用而生成含有自由基的产物。

When this is basically understood, not the verbal meaning but the actual truth of it - the relationship of teacher and student undergoes a radical change.───如果完全理解了这一点，不是理解了字面意思，而是理解了这项事实，老师和学生的关系将会发生根本的转变。

our society undergoes this radical change, we need to ensure that we manage the impact appropriately.───我们的社会发生了这样根本性的变化，我们需要确保妥善应对它的影响。