How should we define whether we know a word or not?

• Passive words - you can read and understand 被动词汇 - 可读可理解的词汇
• Active words - you can speak and write 主动词汇 - 可说可写的词汇

If you set a goal like "I wanna learn 100 words that I can use correctly a day", it will be too difficult to reach and keep as a daily habit. 如果你定的目标是“每天学100个可以正确使用的单词”，那可能有点遥不可及，而且很难坚持。

Yet if you set a goal like "I wanna know 100 words that I can understand a day", you can do it! 但是如果你把目标定为“每天认识100个单词”，你是做得到的！

You may argue that you've already known a lot of words, and you just want to learn how to use them. However, one of the ways to fix this problem is to read and listen to as many materials as you can, and then you will figure out how to use them naturally but not awkwardly.
你可能会说你已经知道很多单词了，只想学习如何使用它们。但是，解决不会用词的其中一个方法就是多听多读，从中学到如何自然使用而不是拼凑成怪怪的感觉。

Therefore, the first goal is to meet as many passive words as you can. 因此，首要任务是接触积累尽可能多的被动词汇。

The bigger your passive words pool is, the bigger your later active words pool will be. 随着被动词汇储备的增长，主动词汇储备也会增长。

It might be slow and not with a high ratio of conversion, but it's an unavoidable process. 这个过程可能很慢，转化比例也不高，但是不可避免。

Some useful steps for improving the conversion ratio:

1. Expand your passive words pool by reading and listening to longer content but not just short articles. 听读长的内容而不只是短篇文章，扩大你的被动词汇储备池。
2. Write. (Keep a diary.) Write as you say, or you will write in an unnatural tone. 写作。（可以写日记。）像说话那样去写东西，否则很容易写得不自然。
3. Learn some handy key phrases to use in conversations. 学一些对话里方便好用的词组搭配。
4. Make flashcards or write them down to repeat and recite. 制作抽认卡或者写下来，重复记诵。
5. Don't worry about your faults and keep saying. 别总是担心自己的错误，要多说多表达。