贝壳 英语： n. shell ; conch ; cowry misc. mother of pearl 双语例句： 退潮时我们可以在沙滩上捡贝壳。

When the tide is out,we can pick up some shells on the sand. 她把贝壳串在一起，然后戴在脖子上。

She threaded the shells together and wore them round her neck. 退潮后沙滩上留下了许多贝壳。

When the tide had ebbed away,the shells were left on the sand.