The right, but not the obligation, to sell or buy the underlying (in this case, a futures contract) at a specified price within a specified time.是什么意思_The right, but not the obligation, to sell or buy the underlying (in this case, a futures contract) at a specified price within a specified time.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句