而实际上，ITA是很多大型在线旅行社和元搜索网站交易流程中的重要组成部分，有了ITA提供的这些软件，这些网站才可以直接向它们的用户销售机票。
But the fact is, ITA is the primary transaction component for major OTAs and Meta Search sites, allowing them to sell seats directly to site visitors.
获益类似于向贫困家庭每月提供大约100元的“机遇”方案所产生的获益（不过“机遇”有其他好处，包括改善健康。）
The gains are similar to those generated by the “Opportunities” programme, which gives poor families about $100 a month (although “Opportunities” has other benefits, including improved health.)
将该方案与无向传递签名方案结合，提出一个可对任何有向二元传递关系进行签名的方案。
A solution for signing any directed transitive binary relation is presented by combining the proposed scheme with the undirected transitive signature schemes available.
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