典型的类似流的输出方法，flush 和 close ，可以分别用来促使编写器将任何缓存的数据写入底层输出和关闭编写器对象。

The typical output stream-like methods, flush and close, force the writer to write any cached data to the underlying output, and close the writer object, respectively.

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该设计使用了基于空间散列的帧频控制算法以优化LCD显示图像质量，并使用两级缓存结构以保证稳定的输出数据流。

This design USES a frame rate control algorithm based on space-hash to improve the quality of the LCD display. It USES two-level buffer structure to ensure steady output flow.

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