n. something kept back or saved for future use or a special purpose
n. (medicine) potential capacity to respond in order to maintain vital functions
n. the trait of being uncommunicative; not volunteering anything more than necessary
v. hold back or set aside, especially for future use or contingency
n. 储备品, 贮量, 后备军, 自然保护区, 保留, 拘谨, 节制, 储备金
vt. 保留, 保存, 预订, 延期, 推迟