短语词组短語a big mass of 一大片a dense mass of 黑壓壓a jumbled mass of reeds 亂蓬蓬的茅草A Round Mass Of Food 丸子a solid mass of earth 一大塊泥土a compact mass of sand 堅實的沙堆a tangled mass of hair 一團亂發a large mass of rock 一大塊巖石 返回 a mass of