noun 下载 🔗分享 保护,保存,维护 The act of preserving; care to preserve; act of keeping from destruction, decay or any ill. Examples : "The preservation of historical documents in the school library is important for future generations. " 学校图书馆对历史文件的保存,对后代子孙非常重要。 environment history culture action 与AI对话词汇游戏阅读练习