贝壳内壁光滑。
The shell is smooth on the inside.
他喜欢在海滨捡贝壳。
He liked to look for shells on the seashore.
她把贝壳串在一条银链子上。
She had strung the shells on a silver chain.
我们在海滩拾贝壳。
We collected shells on the beach.
她最喜爱的题材是那些在海边散步时发现的贝壳。
Her favourite subjects are shells spotted on beach walks.
