with obj.
1- protect (something, especially an environmentally or culturally important place or thing) from harm or destruction保护, 保存（某事物, 尤指在环境、文化方面有重要意义的地方、物品）：
the funds raised will help conserve endangered meadowlands.
募集的资金将用来保护濒临消失的草地。
1.1
- prevent the wasteful or harmful overuse of (a resource)节约, 防止浪费（资源）：
industry should conserve more water.
工业应该节约更多的水资源。
1.2
- Physics maintain (a quantity such as energy or mass) at a constant overall total【物理】使（量, 如能量、质量）守恒。
1.3
- （一般作 be conserved）Biochemistry retain (a particular amino acid, nucleotide, or sequence of these) unchanged in different protein or DNA molecules【生化】保持（某氨基酸、核苷或其序列）不变, 保存, 保藏。
1.4
- preserve (food, typically fruit) with sugar用糖保存（食物, 尤指水果）; 将…制成蜜饯。
词源
late Middle English: from Old French conserver (verb), conserve (noun), from Latin conservare 'to preserve', from con- 'together' + servare 'to keep'.