Commentary in the form of keywords
------
To enable quick review when reviewing
The commentary is sweet as concisely as possible.
-----
[Chinese character display]
For learning effect
Chinese characters are used in a larger notation.
[Check Note]
-----
After registering only wrong or confusing problems in Checknote
You can see it later.
------
[Word book]
------
A vocabulary function has been added so that you can memorize it repeatedly.
Test randomly
You can test only what you choose.
------
To enable quick review when reviewing
The commentary is sweet as concisely as possible.
-----
[Chinese character display]
For learning effect
Chinese characters are used in a larger notation.
[Check Note]
-----
After registering only wrong or confusing problems in Checknote
You can see it later.
------
[Word book]
------
A vocabulary function has been added so that you can memorize it repeatedly.
Test randomly
You can test only what you choose.
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