preservation of physical evidence

例句：

1. 1. The government has implemented strict measuresto preserve the environment.
   政府已经实施了严格的措施来保护环境。
2. 2. Thescientist is a conservationistwho works tirelessly to protectendangered species.
   这位科学家是一位致力于保护濒危物种的环保主义者。
3. 3.Preservationists argue that the naturalworld should be preserved for future generations.
   保护主义者认为，自然界应该被保留给未来的后代。