Picklebunker c16014531e Updated grammar and readability (#30658)
* Updated grammar and readability 

Terms such as class and item are either referred to in English or avoided in the Chinese versions of tutorials that I have found, as translating them directly does not make much sense.
Changed some sentence structures for the ease of understandings.

* fix typo
2019-05-07 12:14:06 -07:00
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