为了避开耀眼的阳光，汽车司机们通常会单一副特殊的眼睛。
To avoid the glare of the sun, drivers always wear a special pair of glasses.
如果遵循“不要重复自己”原则，您会了解单一副本是权威副本。
If you "don't repeat yourself," you know that the single copy is the canonical copy.
因此，数据总是新鲜的，因为所有应用程序实例都查看缓存中相同的单一副本。
Therefore, the data is always fresh because all of the application instances see the same single copy in the cache.
因此，数据总是新鲜的，因为所有应用程序实例都查看缓存中相同的单一副本。
Therefore, the data is always fresh because all of the application instances see the same single copy in the cache.
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