granite bed的用法和樣例：
例句
- Wenquan molybdenum deposit is a porphyry type mineral deposit related with Indosinian granite.
溫泉鉬礦是與印支期花崗岩有關的斑岩型鉬礦床。 - Instead, the Yangtze hits a large bedrock of solid granite at Shi Gu and changes course completely, heading east across the entire country.
長江在石鼓遇見了一個巨大堅實的花崗岩岩床，完全改變了他的方向，向東貫穿了整個中國。
