OBJECTIVE: to evaluate cytotoxicity and genotoxicity of oyster shell powder.

目的：评价牡蛎壳粉末的细胞毒性和遗传毒性。

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Large quantities of oyster shell are abandoned, which not only pollute the environment, but also waste resources.

人们在食用牡蛎肉后，将大量牡蛎壳丢弃，既污染环境，又造成了资源浪费。

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Oyster shell flour is a kind of animalized mineral feedstuff with higher calcium content, widely used in producing mixed feed.

贝壳粉是一种含钙量极高的动物性矿物质饲料，被广泛应用于配合饲料的配方当中。

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More than fifty restaurants, seafood dealers and other businesses have joined the Oyster Shell Recycling Alliance.

VOA: special.2010.12.07

Hawkins paces out just one square foot of foreshore and picks up Victorian plate, modern glass, oyster shell, medieval roof tile, granite ballast from merchant ships and clay pipe stems.

BBC: London from the tide line

Having found one, it grows into a spat, which when seen beneath a microscope already resembles a tiny oyster, with the shape of a shell already visible.

ECONOMIST: A dozen ocean-cleaners and a pint of Guinness, please

Schneider scrunches up his nose, a large oyster that has another smaller and deformed relative attached to its curved upper shell has caught his attention.

FORBES: Oysters Are Back In New York City Waters