“圆石”造句

河床上散布着很多大圆石。
The riverbed was strewn with big boulders.

他躲在一块大圆石后面,静静地听着.
He hid behind a great bowlder and fell to listening.

我喜欢沙滩,不喜欢遍布小圆石的海滩.
I prefer a sandy beach to a shingly one.