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To learn his system, people must first know how to write letters of the alphabet and learn which sounds they represent.

为了学习他的系统，人们必须首先知道如何书写字母表中的字母，并学习它们的发音。

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When did you first know you wanted to be a sushi chef?

你什么时候开始知道你想要成为一名主厨？

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He said he would get it, but first he wanted to know how big she thought the moon was.

VOA: special.2009.03.28

Soon we'll know. First of all, we'd better say, as is already clear from what we've been quoting, language is not quite Saussurian.

我们很快就会知道，首先，从引文中很容易看出，语言不是索绪尔式的。

耶鲁公开课 - 文学理论导论课程节选

And I know that like in Japan, they like to cultivate relationships first before they do business with one another,

我知道，在日本，人们在做生意之前先经营彼此关系。

学习外语的重要性 - SpeakingMax英语口语达人

For filmmakers to bring their audiences along on a particular issue, they must first know very clearly where they are trying to go.

FORBES: Shifting Narratives Through Documentary Film: A Case Study of 'Budrus'

In the present case, it is undisputed that not only did the Light Brothers know that GCAD owed federal withholding taxes during the time period in question, they were the first to know that information.

FORBES: What Were They Thinking ?

That means making sure first responders know what to do, she added.

CNN: Past bombings prepared response in Boston