这些鹅卵石光滑而圆润。

These ___pebbles are smooth and round.

这些鹅卵石堆在沙滩上。

These ___pebbles are piled on the beach.

我们在花园的小径上铺了一层漂亮的鹅卵石。

We spread a layer of beautiful ___pebbles on the garden path.

别为那些琐碎的闲言碎语烦恼，它们不过是人生路上的小石子。

Don't let those trivial gossip bother you – they're just little ___pebbles on your life path.