利用屏幕上的功能，把画架接口，让用户用粉笔写。

Take advantage of the onscreen feature, put an easel interface and let the user write with a chalk.

youdao

利用屏幕上的功能，把画架接口，让用户用粉笔写。

Take advantage of the onscreen feature, put an easel interface and let the user write with a chalk.

youdao