一旦你知道它，你将拥有它。

Once you know it, you'll have it.

youdao

而且，更值得注意的是，一旦你造句后，你是否知道：为何这句话即便不符合规则但你仍然能读出它？

And, more remarkable, once you did, have you any idea how come this sentence breaks the rules but read it you still can?

youdao

顺便说一句，一旦选择其他的搜索引擎，火狐会一直记住，知道你再次把它换成其他的。

By the way, once you do go to another search engine, Firefox stays with it until you change again.

youdao

And once you know how it sounds, making those sounds for yourself would be a lot easier to do.

一旦你知道该怎么发音，你就能更加容易地把它说出来。

想征服英语的话 - SpeakingMax英语口语达人

Well in C and other languages that we'll see this semester, you use what's called the for loop, and this as syntax isn't quite as straightforward but once you know what to look for, it's very easy to understand.

在C语言和一些我们这学期将要接触的编程语言中，你将会用到所谓的for循环，也许作为一种语法规则，它看起来不是那么的通俗易懂,但是你一旦知道曲中奥妙，就不难理解了。

哈佛公开课 - 计算机科学课程节选