Call An option contract giving the owner the right (but not the obligation) to buy a specified amount of an underlying security at a specified price within a specified time.是什么意思_Call An option contract giving the owner the right (but not the obligation) to buy a specified amount of an underlying security at a specified price within a specified time.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句