Come summertime, American supermarkets stock their shelves with tanning lotions and creams either to help the sun bronze your skin or to change the color immediately by chemical means.

• 夏天到来的时候，美国超市的货架上放满了美“黑”霜、美“黑”油，这些产品要么是有助于阳光将你的皮肤变成古铜色，要么是借助化学反应使你的皮肤立刻改变颜色。