How did we get to the point where people stopped using safe and effective protection against a disease, and decide instead to take their chances?

我们是如何发展到人们不再使用安全有效的疾病防护措施，而是决定碰碰运气的地步的？

A large number of rare and endangered species have been placed under effective protection, and the diversity, stability and sustainability of the ecosystem have kept improving. We have found a path of biodiversity protection with Chinese characteristics.

一大批珍稀濒危物种得到有效保护，生态系统多样性、稳定性和可持续性不断增强，走出了一条中国特色的生物多样性保护之路。