noun [具体名词] 鹅卵石，砾石；水晶透镜
She bent down to shake a pebble out of her shoe. 她弯下腰，把鞋里的一粒石子抖出来。
verb [vt. 及物动词] 用卵石铺
He was used to throwing each pebble into the sea as soon as he picked it up. 他习惯了一捡起鹅卵石就把它扔进海里。
adjective [原级] <非正式>（眼镜片）很厚的，凸起的
The bulk of the ruby rubbish on the pebble bubbles when stirred by bulbed rubber club. 小卵石上的大部分红宝石废料在用有球状突起的橡胶短棍搅动时起泡。
