This photo essay highlights some of the key health issues related to urbanization and five WHO-recommended, calls to action to build a healthy and safe urban environment.
Chapter summaries are useful because they can help you recall a key event or character that you need to include in an essay or a book report.
章节概述非常有用，因为章节概述可以帮助你回忆起论文或读书报告中需要用到的重要事件或关键人物。
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In a terrific 2009 essay called "Crap Detection 101" (riffing off a long-ago line from Ernest Hemingway), he wrote about some of the ways to check things out. Here's a key quote.