Zhihu, a high-quality Q&A community on the Chinese Internet and an original content platform where creators gather, was officially launched in January 2011 with the brand mission of "allowing people to better share knowledge, experience and insights, and find their own answers." Zhihu relies on seriousness and professionalism. The difference between type and token: type emphasizes "different words". If there are repeated words in a sentence, no matter how many times it is repeated, it can only be counted as one type. The bold word "directly" appears twice in this sentence, so these two directly can only be counted as 1. Type help by william rous
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