否定形式是meaningless，例如：
1、Getting your priorities in order is a good way to not waste energy on meaningless pursuits.将事情按优先顺序排列能有效地避免把精力浪费在无意义的工作上。
2、Fines are meaningless to a huge company like that.对于这样一家大公司，罚金根本算不了什么。
3、We fill up our lives with meaningless tasks.我们终日忙忙碌碌，过得毫无意义。
