Hence, free radicals are dangerous and scientists believe that the continuous exposure to free radicals is the major cause of ageing and also of many degenerative diseases.
因此自由基是有害的，科学家认为自由基连续的破坏是衰老和很多退化疾病的主要原因。
2
The catalytic activities and ageing resistant performance of above catalysts for methane combustion was evaluated in a continuous-flow micro-reactor.