preserve
单词辨析：
指经常维修机器、建筑物等，使其保持良好状态。
Which company is responsible for maintaining this equipment?
哪家公司负责维护这台设备？
The garden is large and difficult to maintain.
这个花园很大，难以养护。
较正式用词，通常指保护自然资源使其不发生改变或破坏。
We must conserve our land/natural resources for future generations.
我们必须为后代子孙保护土地/自然资源。
Some environmentalists urged that the government take effective measures to conserve the wildlife.
一些环保人士呼吁政府采取有效措施保护野生动物。
指将某物完好地保存，通常用被动语态。
The city council spent a lot of money to preserve the old castle.
市政委员会花了不少钱来保护那座古城堡。
This bowl has been preserved intact.
这个碗保存得完好无损。
The house from 15th century has been perfectly preserved.
这座建于15世纪的宅第保存完好。
相关例句：
Crabtree& Evelyn has just launched a new jam, Worcesterberry Preserve
瑰珀翠刚推出一款新果酱——伍斯特浆果果酱。
Ice helps to preserve food.
冰能帮助保藏食物。
The conduct of foreign policy is largely the preserve of the president
外交政策事宜主要由总统专门负责。
After the Norman Conquest the forest became a royal hunting preserve
诺曼征服之后，这片森林成为了皇家狩猎区。
Electrons or any other "particle" should display wave properties to preserve the complementary wave-particle symmetry of nature.
电子及其他任何粒子都应该显示波的性质，才能体现自然界波粒互补的对称性。
The Wanglang Preserve in western Sichuan is the haunt of the giant panda.
川西的王朗自然保护区是大熊猫出没的地方。