noun
reserve
/ri'zә:v/
reserve 是什么意思
储备品，贮量，后备军，自然保护区
Something kept back or saved for future use or a special purpose (medicine) potential capacity to respond in order to maintain vital functions the trait of being uncommunicative; not volunteering anything more than necessary hold back or set aside, especially for future use or contingency.
词性
noun
难度
进阶
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