opportunity cost
機会費用
Best alternative to a negotiated agreement
Budget constraint
Economic value added
fear of missing out
Opportunity cost of capital
Parable of the broken window
Production-possibility frontier
Reduced cost aka 'opportunity cost' in linear programming
There ain't no such thing as a free lunch
time management
Trade-off
You can't have your cake and eat it
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wikipedia opportunity cost
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jisho opportunity cost