Here's a simple in-memory writer that collects all written data:
这样的墨水屏特化产品，市场上并不少见：有像百词斩，把墨水屏学习机的；也有像文石 Palma 这样，除了打电话之外，智能手机功能一应俱全的类手机阅读器；更早些年，爱范儿也评测过装在手机壳上的「墨水屏保护壳」。，详情可参考WPS下载最新地址
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