A put option is a contract that gives its owner the right to sell an asset at a future date at a predetermined price.
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到了守岁的十二点了，又要放鞭炮，我没再追问宴席的细节。阿爸把那挂红鞭炮提到门口，鲜红的一长串，铺在水泥地上。火星一路蹿过去，红纸炸开，碎屑落满一地。，详情可参考同城约会
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