adj.浪费的；挥霍的
His weakness is that he is very wasteful. 他的弱点是爱浪费。
We must avoid wasteful duplication of effort. 我们必须避免无谓的重复劳动。
It is wasteful to throw way glass, paper and metal. 把玻璃，纸张以及金属扔掉是很浪费的。
adv.挥霍地；不经济地
