双语例句
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30 species of whales, dolphins and porpoises.
30种鲸，海豚和鼠海豚。
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Porpoises and sharks are natural enemies.
海豚和鲨鱼是天然仇敌。
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Porpoises and sharks are natural enemies.
海豚和鲨鱼是一对天敌。
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In 1928 some porpoises were photographed.
1928年，有人拍摄到了海豚。
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Porpoises and sharks are natural enemies.
海豚在孩子们面前跳舞。