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
词态变化
原型:boulder
变形:s
常见例句
1
consists of sand and clay and gravel and boulders mixed together v
2
consists of sand and clay and gravel and boulders mixed together n a treasury for government funds n a strongbox for holding cash v work land as by ploughing, harrowing, and manuring, in order to make it ready for cultivation
