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.
现在有大量的编译器存在，其中有许多是免费的。
There are a large number of compilers available, including many free ones.
其中许多是免费的签署，他们可以是一个伟大的地方开始学习。
Many of them are free to sign up to and they can be a great place to start learning.
有许多工具可以用来记录你的时间安排。其中有一个很好的免费工具，它可以对你所做的项目进行程序化跟踪，使你的时间安排更加明晰。
There're lots of tools which can be used to record schedule, one of them is excellent and free, and it can implement programmed tracking for your project, making your arrangement more reasonable.
基于UNIX的系统，其中许多是免费的在感官，是最受欢迎的。
UNIX-based systems, many of which are free in both senses, are the most popular.
搜索营销技巧pdf格式，并列出许多其他免费关键字研究工具，其中包括提供了一些免费的关键字研究部影片在该网页。
Search Marketing Tips PDF and lists many other free keyword research tools, and includes offers a few free keyword research videos on that page.
有许多生产者的低端二维系统，其中包括了一些免费的开放源码程序。
There are many producers of the lower-end 2D systems, including a number of free and open source programs.
有许多生产者的低端二维系统，其中包括了一些免费的开放源码程序。
There are many producers of the lower-end 2D systems, including a number of free and open source programs.
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