| 单词 | 守恒 |
| 释义 | 〔conservation〕The maintenance of a physical quantity, such as energy or mass, during a physical or chemical change.守恒：在物理或化学变化过程中能量或质量等物理数量的维持原状〔conserve〕To keep (a quantity) constant through physical or chemical reactions or evolutionary changes.守恒：在物理、化学反应过程中或演化过程中保持（一种数量）恒定不变 |
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