Put it on a wet sponge to clean crayon off a chalk board.

湿海绵上放些小苏打可以擦掉黑板上的粉笔画。

youdao

Put it on a wet sponge to clean crayon off a chalk board.

湿海绵上放些小苏打可以擦掉黑板上的粉笔画。

youdao