Adjective:

1. coming down freely under the influence of gravity;

   "the eerie whistle of dropping bombs"
   "falling rain"
   

guttan.[建]圆锥饰；[医](药水的)一滴；古塔胶

downadv.向下prep.沿着 ... 而下adj.向下的；消沉的；无礼的n.绒毛；汗毛v.击倒；打败；吞下；被抑制

fallingn.坠落；下降adj.落下的；下降的动词fall的现在分词.

1. Constant dropping wears away a stone.
   滴水穿石。

1. You lost your eye to a seagull droppings?
   海鸥粪把你的眼睛弄瞎了?
2. The droppings from the fowls make the ground rich in nitrogen.
   鸟粪使土地含氮丰富。
3. There were bird droppings all over the car parked under the tree.
   停在树下的车上全是鸟粪。