本期内容：

A new documentary, Underwater China, reveals submerged caves, secret gardens and broken shipwrecks from several thousand years ago.
Although this is a tranquil silent world, its wonders easily rival those of the world above water.


documentary n. 纪录片
• a documentary on the Civil War: 一部关于内战的纪录片
reveal vt. 揭示；显示；透露（disclose）
• reveal a secret: 泄露一条秘密
• reveal his identity: 揭示他的身分
submerged adj. 在水中的，淹没的，水下的
• submerged leaves/rock/caves: 水下的叶子/石头/洞穴
• submerge vt. 浸没，淹没；（抽象含义的）沉浸
• She submerges her hands in warm water.
她把手浸在温水中。
• I am absolutely submerged in work.
我完全沉浸在工作之中了。
shipwreck n. 沉船
tranquil adj. 安静的；平静的
• a tranquil scene: 静谧的景象
• She led a tranquil life in the country.
她过着恬静的乡村生活。
wonder n. 奇观
• seven wonders of the world: 世界七大奇观
rival vt. 比得上，与…….相匹敌



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