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He knows the history of Britain from A to Z.

他对英国的历史了如指掌。

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Also important is the number of layers (Z-index) that can be placed on a Web page to accommodate the overflow of the expanded text and more intensive graphic images.

(z索引的)层次数目也是很重要的，这些层可以放在Web页面上用于调整扩展文字和更密集图形图像的溢出。

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This week, one London-based company specialising in money transfers to Zimbabwe posted on the internet a tariff of Z$40,000 to the British pound (Z$20,250 to the greenback).

上周，专业从事对津巴布韦资金转移的一家伦敦公司在互联网上公布了一英镑兑换40000津元的报价（折合一美元兑换20250津元）。