n. a large smooth mass of rock detached from its place of origin
n. a town in north central Colorado; Rocky Mountains resort center and university town
n. 大圆石
[机] 圆石, 漂石
1. The children climbed over the big boulder in the park.
孩子们在公园里爬过那块大岩石。
2. A boulder blocked the path, making it difficult to hike.
一块岩石挡住了小路，使得徒步旅行变得困难。
3. We found a smooth boulder by the river where we could sit and relax.
我们在河边找到了一块光滑的岩石，可以坐下休息。