确保在执行写迭代后刷新数据；否则，它将滞留在缓冲区中，直到向流写入下一次迭代。

Make sure you flush the data after you're done writing an iteration; otherwise, it may be stuck in a buffer until the next iteration is written to the stream.

youdao

确保在执行写迭代后刷新数据；否则，它将滞留在缓冲区中，直到向流写入下一次迭代。

Make sure you flush the data after you're done writing an iteration; otherwise, it may be stuck in a buffer until the next iteration is written to the stream.

youdao