Block definition diagram and internal block diagram improvements.

块定义图以及内部块图改进。

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In the 1980s, the DMA tried unsuccessfully to block the Internal Revenue Service from using a private magazine subscription list to find potential tax cheats.

FORBES: California Tax Collectors Eye Buying Names Of Web Shoppers

After an internal review of shipment records from a distributor, Blue Coat was able to provide information to help block future transfers.

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America has agreed to negotiate with the EU as a block, but it will still try to limit Europe's access to America's internal market.

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