The unusually high mortality rate among dolphin calves in the industrially contaminated waters along Florida's Gulf Coast is probably the result of their being poisoned by their mother's milk.

在佛罗里达海湾沿岸被工业污染的水域中，海豚幼崽异常高的死亡率可能是被它们母亲的乳汁毒害的结果。

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A high mortality rate of 20% to 60% has been reported.

死亡率根据过去的报告高达百分之20到60。

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He says this can help bring down the high mortality rate.

他说，这可以帮助降低高死亡率。

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Novy-Hildesley explains, the doctor faced a high rate of infant mortality in the clinic.

VOA: standard.2009.12.18

People with serious illnesses (and substance use disorders have a high mortality rate) are vulnerable.

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Part of the reason for the high mortality rate is that lung cancer is notoriously difficult to identify early.

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Fish health inspectors visited Seasalter Shellfish in the town after the producer reported a high mortality rate in its Pacific oyster stocks.

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