只有当你失去某物时才会知道它有多珍贵。
Only when you have lost something will you know how precious it is.
然而，我们可以用行为模式来加以解释：人们对某物的价值认识会受到他们是否拥有此物的影响，因为在得失相当的情况下，人们对失去的害怕甚于对得到的喜爱。
But it can be explained by behavioural models in which the value people attach to objects is affected by what they already have, and people abhor losses more than they like equivalent gains.
这些动词的意思是伤害且使某物，有时是人失去用处、声音或价值。
These verbs mean to injure and deprive something-or, less often, someone-of usefulness, soundness, or value.
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