软件公司和程序员们可以对他们的程序自由收费，其中30%的销售额要归苹果所有——我期待许多或者绝大多数程序会是免费的。
Software companies and programmers can charge anything they like for their programs-apple keeps 30 percent of each sale-but I expect many or most of the apps will be free.
有许多极好的IDE可供选择——其中一些甚至是免费的——您尽可以选择一个试用一下，如果您是专业人员，就更应如此。
With so many excellent IDE options out there — some of which are even free — I can't see any reason not to give one a try, particularly if you're a professional.
相当多的应用程序(其中许多是免费的)能够阅读rss提要，其中许多允许用户聚合提要。
A good number of applications, many of them free, can read an RSS feed and many of them allow you to aggregate the feeds.
应用推荐