The notion of conservation is that there's ways to transform things such that some aspects of them change but others remain the same.
守恒是指物体某方面的特征,不会因为其他方面特征的改变,而有所改变
These properties remain the same when others are altered.
这些性质在其它性质改变时保持不变。
These properties remain the same when others are altered.
这些性质在其它性质改变时保持不变。
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