An option is a derivative contract that gives the purchaser the right, but not the obligation, to buy or sell an asset at a certain price.
期权是一种只给买方带来权利，而不需买方承担义务，使其可在未来以某一确定价格买卖资产的衍生品。
2
The price must be legible to a purchaser.
价格要写得清楚些，让买家一眼能辨认出。
3
Such a reputation creates a consumer franchise that allows the value of the product to the purchaser, rather than its production cost, to be the major determinant of selling price.