A call option, for example, gives the holder the right to buy an asset at a specified price within a specified period.
比如说，一个看涨期权，可以让持有者有权在一段特定的时间内以一个特定的价格买入一个资产。
Putt option refers to the right given to the option holder to sell (not the liability to sell) an asset at a specified price within specific time period.
卖方期权，是指期权持有人在期权有效期内按履约价格卖出（但不负有必须卖出的责任）规定的资产的权利。 。
Call option refers to the right given to the option holder to buy (not the liability to buy) an asset at a specified price within specific time period.
买方期权，是指赋予期权持有人在期权有效期内按履约价格买进(但不负有必须买进的义务)规定的资产的权利。
It remains a fast, convenient option for parents and grandparents wanting to spend an extended period of time in Canada with their families.
对于想在加拿大与家人度过更长的团聚时光的父母和祖父母来说，超级签证仍然是一个快速、方便的选择。
It remains a fast, convenient option for parents and grandparents wanting to spend an extended period of time in Canada with their families.
对于想在加拿大与家人度过更长的团聚时光的父母和祖父母来说，超级签证仍然是一个快速、方便的选择。
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