If you are a USA florist exchange banner ads with a Canadian florist. This helps users who need to send international flowers and it also helps to boost your link popularity which everyone loves.

如果你是一位美国种花人，与一位加拿大种花人交换了旗帜广告，这将帮助需要跨国送花服务的用户，它还有助于提高你网站链接的人气度，人人都热衷于此。

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Notice that no separate main function is needed, nor does the code use any link library: the unit_test.hpp header that's part of the Boost installation contains all the necessary definitions.

注意，不需要单独的主函数，代码也不使用任何链接库：作为Boost一部分的unit _ test . hpp头文件中包含所需的所有定义。

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This is a nifty feature to have; you just download the Boost sources (see Resources for a link), and you're ready to get started.

这是一个非常好的特性；您只需下载Boos t源代码(见参考资料中的链接)，然后就可以开始使用了。

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But for the CDM to provide that link, countries will have to reduce their greenhouse-gas emission targets drastically, thus providing a boost to demand.

ECONOMIST: Carbon markets