principle of conservation of transformations

例句：

1. 1. The government is working hard to conserve the environment.
   政府正努力保护环境。
2. 2. The conservation of endangered species is crucial for biodiversity.
   保护濒危物种对生物多样性至关重要。
3. 3.Conservation efforts have helped to restore the ecosystem.
   保护工作有助于恢复生态系统。