a. tending to squander and waste
s. laying waste
a. 浪费的, 不经济的
1. It is wasteful to leave the lights on when no one is in the room.
离开房间时不关灯是浪费的。
2. Buying bottled water every day can be very wasteful.
每天买瓶装水是非常浪费的。
3. We should find ways to reduce wasteful habits in our daily lives.
我们应该找到减少日常生活中浪费习惯的方法。