苹果过去二十年最成功的生意，就是构建了一个以App Store为核心的封闭王国，通过控制分发渠道来收取"过路费"。
Last week the markets had been relatively relaxed about the seemingly nightmare scenario of millions of barrels of crude and liquefied gas trapped in the Gulf.
。关于这个话题，免实名服务器提供了深入分析
var history = await GetKeyHistoryAsync();
~/Documents/file.txt) by expanding the tilde to the user's home