如果没有窗，尤其是应注重细节的门。
If no window, especially should pay attention to the details of the door.
请确认没有用纸毛巾，如果用这些将能够留下棉和其它一些纤维，或者像用一些擦窗器，它将降低你的显示。
Be sure not to use either paper towels, which can leave lint and other fibers, or solutions like window cleaner, which can degrade your display.
如果你的业务有空窗期可以做etl，那是最好的；如果没有，管理可伸缩性就是很大的挑战。
If your business has nice offline Windows for the ETL, that's great, but if not, managing the scale becomes a challenge.
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