When he croaked, the water snails listened politely.

当他叫时，水蜗牛礼貌地听着。

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When he croaked, the water snails listened politely.

当他发牢骚时，水波动着有礼貌地倾听着。

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Fresh-water snails were collected from the fields for examining cercariae.

现场采集标本，剖检淡水螺类，检查并殖吸虫尾蚴感染情况。

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Somewhere in the middle may be schistosomiasis, a debilitating disease caused by a parasitic flatworm carried by water snails, which affects 200m people worldwide.

ECONOMIST: Genetics and infectious disease: The germ of an idea | The

Norman Robinson from the Environment Agency said 100% of invertebrates including pond skaters, water shrimps, water snails, leeches, and Mayflies, close to the source of the chemical spill, had died.

BBC: River Nene pollution wipes out invertebrates

Organisms that make shells or have skeletons that are exposed to seawater, such as clams, snails and sea butterflies, could see their shells dissolve in water that is too acidic.

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