For example, debuggers often involve stepping through execution traces, so we use bubbles to display the trace onscreen, side-by-side as the user steps in and steps out of various functions.
例如，调试人员经常涉及分步执行跟踪，所以我们利用气泡显示跟踪屏幕，随着用户跳入、跳出各个函数的同时展示相关的内容。
Stepping through the newspaper pages does not necessarily change the server side state, which in this case is the entire information contained in the newspaper.
逐页浏览报纸的页面不一定会更改服务器端的状态，此状态在本例中就是报纸中包含的全部信息。
So you wanna walk a little bit like a skier, side-stepping down a mountain, nice and easy, with your feet like this, and that's the safest way of going down.
所以你要有点像滑雪者一样走路，双脚像这样优雅平稳地侧身下山，那是最安全的下山方法。
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