boulder

🇬🇧/ˈbəʊldə(r)/ 🇺🇸/ˈboʊldər/📚 7107 89 1托福
A boulder is a large rounded rock. 圆形巨石

noun [具体名词](受水或天气侵蚀而成的)巨石,巨砾

It is thought that the train hit a boulder that had fallen down a cliff on to the track.
人们认为这列火车撞到了从悬崖滚到铁轨上的大圆石。

boulder 出现在下面的课文中
Lesson 39 Nothing to worry about boulder 名词: 大石块
单词造句: