I've been to London before so I know the ropes.

我去过伦敦，所以我了解伦敦的状况。

youdao

I am a transfer student and I've already done a year at another university so I know how the research can go.

我是一名转学学生，我已经在另一所大学学习了一年，所以我知道研究可以如何进行。

youdao

I hear news about China on television and read about it in print media, so I know of the rapid development of China in recent decades.

我在电视上听关于中国的消息，在纸媒上读关于中国的新闻，所以我知道中国在近几十年的快速发展。

youdao

So I know.I saw the whole thing from the beginning, from the very day when the little boy here met with the accident."

VOA: special.2010.05.15

Now, I look around this room, I don't see anybody whose head is three times bigger than mine, so I know that you cannot digest everything the books have.

我在教室里扫了一遍,没看见谁的脑袋比我大三倍,我知道你们是不可能看完这本书的

耶鲁公开课 - 基础物理课程节选

Sure. So I spent some time over in England, so I know a little bit about how they practice law,

当然。我在英国呆了一阵子，所以我对英国的法律有一些了解，

美国式对比英国式 - SpeakingMax英语口语达人

So I know that they are thrilled that you guys are willing to work with them.

WHITEHOUSE: President Obama Meets 2011 NCAA Women's Basketball Champs

So I know that, for me, this might be the last run of the day.

FORBES: I Left My Job Because of Skiing

So I know that when I rebuild where I live, I got to do it differently.

NPR: Group Unveils Plans to Rebuild New Orleans