bowlder是什么意思？

bowlder

英['bəʊldə] 美['boʊldə]

• n. 圆石头，巨砾，玉石；

例句

• The large bowlder surface of table must be uplifted vertically in avoidance of breakage. 大面积的餐台玉石面,必须竖抬,避免餐台断裂.
• He hid behind a great bowlder and fell to listening. 他躲在一块大圆石后面,静静地听着.

英英词典释义

• Noun
  1. a large smooth mass of rock detached from its place of origin