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

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