The seashells she sells are seashells she is sure .

她肯定她卖的贝壳是海贝壳。

These are the seashells we collected last summer .

这些海贝是我们去年夏天搜集的。

She sells seashells on the shining seashore and the shells she sells are seashells , I 'm sure .

她在阳光灿烂的沙滩上卖海贝壳，我确定她卖的贝壳是海贝壳。

The shells she sells are surely seashells .

她卖的贝壳的确是海贝壳。

We walked along the beach collecting seashells .

我们沿着海滩边走边捡贝壳。