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a concrete or earth wall surrounding a storage tank containing crude oil or its refined product, designed to hold the contents of the tank in the event of a rupture or leak 壆墙
Much of the time, though, Clinton and his family were touring, gazing at the fabulous terra-cotta army of Xian, the Great Wall, the neon-lit Shanghai Bund at night, the ethereal karst mountains of Guilin and the towering tangle of Hong Kong's skyscrapers.
The trip included visits to the forbidden city and great wall of China in Beijing, the terra cotta warrior museum in Xi An and the Bund and French Concession in Shanghai.