If you borrow something, try to return it in better shape than you received it. Clean it, sharpen it, fill it up.
如果你借了什么东西,试着在归还的时候把它变得比你借到时的状态更好。清洁它、打磨它、填充它。
Environmental protection is our inescapable responsibility. We must pay attention to ecological protection in the mining process to achieve sustainable development.