opportunity cost是什么意思？

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• disappointed
• panicked
• ticket
• saturday
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• theatre
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• BARRIE
• erased
• passage
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• ultra
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• monitor
• client
• failure
• giraffe
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• 局外人英文
• reveal
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• toxicity
• tomato
• repeat
• amazing
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• crayon
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• various
• aspect
• 来源英语
• 队长的英文
• satisfaction
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• passage
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• candy

• stick to sth
• stick up
• stunt man
• take after sb
• take account of sth
• take heart from
• take sb off
• take sb out
• take sth apart
• take sth back
• take sth down
• take sth in
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• take to sth
• teem with
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• the present day
• time and again
• Tropic of Cancer