They already held Siberia and they reached the Pacific Ocean in the 1640s.

他们已经控制了西伯利亚,在15世纪40年代,其势力已经到达太平洋西岸

耶鲁公开课 - 欧洲文明课程节选

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