一旦启动应用程序，URL 请求便已准备就绪。

On launching the application, a URL request is prepared.

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它一旦启动，发射程序将点燃两个绑在他座椅后面的两个火箭。

As soon as it was activated, the ejection sequence activated two rockets attached to the back of his chair.

youdao

一旦启动less程序，less程序就会每次显示一页的文本内容。

Once started, less will display the text file one page at a time.

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Now on the next screen, once this thing resumes, realize that-- come on.

下面我们看下一个画面，注意啦，一旦启动，好好地去感受一下。

哈佛公开课 - 计算机科学课程节选