The traditional library got a huge strike from the Knowledge Economy Society, it require us to reconstruct our library service strategy.
知识经济社会对传统图书馆产生巨大冲击，这要求我们对图书馆的服务战略进行重构。
It is a kind of option strategy that the investor buy and sell the same type of two options which have the same expiry date but with the different strike price.
投资人在同一时间买进和卖出同一类期权，此两个期权到期日相同，但执行价格不同。
This kind of option strategy is comprised by one put and one call options with the same strike price and the same expiry date.
该组合由两份执行价格和到期日均相同的看涨期权和看跌期权组成。
This kind of option strategy is comprised by one put and one call options with the same strike price and the same expiry date.
该组合由两份执行价格和到期日均相同的看涨期权和看跌期权组成。
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