preserver

例句：

1. 1.The preservation of the ancient ruins is a challenge for archaeologists.
   对考古学家来说，保护古代遗迹是一项挑战。
2. 2. The preservation of endangered species is crucial to our planet's health.
   保护濒危物种对于地球的健康至关重要。
3. 3. The preservationist believes in the importance of preserving natural resources.
   保存主义者认为保护自然资源的重要性。