A risk prevention mechanism Mvvs的用法和样例：
例句
- The lack of early-warning and protecting mechanism was the main anthropogenic reason.
事前缺乏预警和相应的防范机制是事件发生的人为原因。 - This interchangeability is an ethnic resource for the progress and optimization of moral beliefs as well as for the social control and preventive mechanism.
道德信仰的律动为道德信仰的进步和优化以及建立有效的社会调控防范机制提高了伦理资源。
