对于摄影两个都不是最佳选择，因JPG比无损耗png小得多，也只是最低程序损失一点画质。
Neither are optimal options for photography, as JPG is much smaller than lossless PNG with only minimal loss of quality.
联合摄影专家组开发无损耗J PG技术来解决这种严重的画质下降问题。
The Joint Photographic Experts Group developed lossless JPG technology to combat this serious problem of quality degradation.
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