conservation of historic buildings

例句：

1. 1. The government is working to protect the environment.
   政府正在努力保护环境。
2. 2. She decided to conserve her energy by walking instead of driving.
   她决定通过步行而不是开车来节省能源。
3. 3. Conservationists are advocating for the preservation of endangered species.
   保护主义者正倡导保护濒危物种。