以下为句子列表：
英文: A lid or flap covering an aperture, such as the gill cover in some fishes or the horny shell cover in snails or other mollusks.
中文: 鳃盖覆盖在一孔或缝隙上的盖，如一些鱼类的鳃或覆盖在蛇或其它软体动物身上的角质壳
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英文: On the other side of the Atlantic, the damming of African rivers has led to the spread of human blood flukes that depend on snails as a host and cause human schistosomiasis.
中文: 在大西洋的另一边，由于非洲河川建了水坝，导致以螺类为寄主的人类血吸虫到处散播，引发人类的血吸虫病。
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英文: One possibility is that lefty snails have difficulty mating with their right-handed relations.
中文: 有一种可能性是左撇子蜗牛难跟右撇子的同类交配。
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英文: The number of people confirmed to have fallen ill after eating raw or half-cooked snails contaminated with parasites at a Beijing restaurant chain has risen from 70 to 87, the Beijing Health Bureau reported on Wednesday.
中文: 周三，北京市卫生局报告说，因在北京一家连锁餐厅食用含寄生虫的半生或生福寿螺染病的确诊人数,从70人上升至87人。
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英文: The water snails were rude to him, and he was afraid of the ducks.
中文: 水蛇对它很粗鲁，它对鸭子也害怕。
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