rock
/rɑk/
a lump or mass of hard consolidated mineral matter
中文释义：岩石；石头
The climber carefully placed his foot on a loose rock.
攀登者小心地把脚踩在一块松动的岩石上。
Geologists study the composition of rocks to understand Earth's history.
地质学家研究岩石成分以了解地球历史。
/rɑk/
a lump or mass of hard consolidated mineral matter
中文释义：岩石；石头
The climber carefully placed his foot on a loose rock.
攀登者小心地把脚踩在一块松动的岩石上。
Geologists study the composition of rocks to understand Earth's history.
地质学家研究岩石成分以了解地球历史。