海贝的英文：
a seashell

She walk along the beach collect seashell.
她沿海滩收集海贝。

Small seashells were once used as a primitive kind of money.
小贝壳曾经被用作简单的钱币。

A word or group of words difficult to articulate rapidly, usually because of a succession of similar consonantal sounds, as in Shall she sell seashells?
拗口令难以迅速，清楚地说出来的词或一串词，通常由于几个相似的辅音连接在一起。

Frank Lloyd Wright, who built an art museum in New York , found inspired by Japanese, seashells .
弗兰克·劳埃德·赖特设计了纽约的艺术博物馆，是日本的海贝壳激发了他的灵感。

A soft, compact calcite, CaCO3, with varying amounts of silica, quartz, feldspar, or other mineral impurities, generally gray - white or yellow - white and derived chiefly from fossil seashells.
白垩一种松软的方解石粉块，CaCO3，含有不等量的硅石、石英、长石或其它矿物杂质，通常为灰白色或黄白色，从贝类化石中制得

"chalk:a soft, compact calcite, CaCO, with varying amounts of silica, quartz, feldspar, or other mineral impurities, generally gray-white or yellow-white and derived chiefly from fossil seashells."
白垩:一种松软的方解石粉块,CaCO,含有不等量的硅石、石英、长石或其它矿物杂质,通常为灰白色或黄白色,从贝类化石中制得.