一旦打开了工程，其中的需求就可以被访问。
Once the project has been opened, the requirements may be retrieved.
一旦打开Notes文档，所有字段(不仅仅是键)都自动填充完成。
When he opens his Notes document, it has all of its fields filled out (not just the keys).
一旦打开了一个已验证连接，getFeed()方法就会检索联系人提要。
Once an authenticated connection is open, the getFeed() method retrieves the contacts feed.
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