Now, to be sure, in Siberia in the far reaches of the north, North Asia, this empire amounted to little more than a series of trading posts, and it took a very long time for any semblance of Russian authority from Moscow and soon from St. Petersburg, for reasons that we'll see, to reach there.

现在,可以肯定,当时的俄国,在西伯利亚和北亚并没有多少商栈,俄国耗费了很多时间,才使得其首都市容变成现在这样,无论是莫斯科,还是之后的圣彼得堡,原因我们会讲到

耶鲁公开课 - 欧洲文明课程节选

You're not going to start for the rest of your life if you ever need to solve a problem with a computer from scratch, odds are you're going to reach for some off the shelf packages or libraries or tools that other people wrote so that people like us don't have to reinvent the wheel again and again.

如果你想用Scratch来解决问题,却使用其他人写的程序,或者利用现成的资料或工具,这样以来,我们的确可以避免做重复性的工作,但却永远学不会编程。

哈佛公开课 - 计算机科学课程节选