And that opens up our perspective to try to understand what other potential components might be tolerated, or in fact even essential, that we presently haven't thought of.
而这一点开拓了我们的观念，去了解还有那些其他的元素是可以接受的，或者甚至是实际上是必需的，而我们目前还没有想到的。
The former closes the alert and the latter opens the presently shown mail in your browser.
前者将关闭通知，后者则在浏览器里打开当前这份邮件。
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