根据语境
plus the option value associated with abandonment opportunities
想表达的意思是“加上与放弃机会（可以理解为机会成本）相关联的选择价值“

In cost benefit analysis and social welfare economics, the term option value refers to the value that is placed on private willingness to pay for maintaining or preserving a public asset or service even if there is little or no likelihood of the individual actually ever using it.