虽然为封闭源代码的项目构建生态系统当然是可能的，但是并不容易。
Building an ecosystem for a closed-source project is certainly possible, but it's not easy.
恶名远扬生物圈二号封闭生态系统项目就是未经充分准备仓促上马的前车之鉴。 1991年，首批八个人住进位于亚利桑那州图克森附近的生物圈二号。
The infamous Biosphere 2 closed-ecosystem project outside Tucson, Ariz., first inhabited by eight people in 1991, is the best example of an approach not to take.
也有人会担心集中、垄断以及封闭式生态系统的危险，让人很难在各种服务之间切换。
There will also be worries about concentration and monopoly, and the danger of closed ecosystems that make it hard for people to switch between services.
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