枉然的

例句：

1. 1. The company's profits have been wasting away dueto poor management.
   由于管理不善，这家公司的利润一直在流失。
2. 2. Don't waste yourtime on useless activities.
   不要浪费时间在无用的活动上。
3. 3. The old books are a greatsource of knowledge and inspiration for the youngergeneration.
   旧书是年轻一代获取知识和灵感的宝贵来源。