n.圆石头，巨砾，玉石...

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.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....

bowlder的音标：bowlder的英式发音音标为：['bəʊldə]bowlder的美式发音音标为：['boʊldə]...