Like the Yongzheng marks on the current vases, the Qianlong mark on the small Taipei vase is a four-character mark written in blue enamel within a double square.

台北故宫珍藏乾隆瓶是用蓝色珐琅彩署双圈四字楷书款，其样式与本拍品的雍正款相同。

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Double square root model suits the survey data most.

双平方根模型最适合于实测数据。

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Double square root (DSR) equation has provided a new theoretical framework for developing wave equation migration.

双平方根(dsr)方程为波动方程偏移提供了一种新的理论框架。

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Remember the Chinese fable of the mighty emperor who agreed to give a wily supplicant one grain of rice for the first square on a chess board, double that for the second square, double again for the third and so on, before he realised that he would be giving away his whole kingdom's supply before the board was half-finished.

ECONOMIST: Eventually, bigger means different

Pantaloon Retail, India's biggest and fastest-growing retailer, has 144 shops in 32 cities, and Kishore Biyani, its founder, plans to double the square footage of his empire by next June.

ECONOMIST: Retailing: Setting up shop in India | The

Rebecca Nash, 22, and Hope Stubbings, 19, said they booked a double room at the Brunswick Square Hotel but when they arrived they were told it only accepted straight couples and families.

BBC: Brighton hotel accused of turning away lesbian couple