软岩石

[ruǎn yán shí]

• soft rock
• soft rocks

例句

1. 钻蛀虫钻入松软岩石或木头中的软体动物
   Any of various mollusks that bore into soft rock or wood.
2. 在软岩石上形成许多深槽。
   Deep grooves channelled the soft rock.