bootless

adj.无用的,无益的

无用的；徒劳的；无益的

形容词

1. His efforts to convince her were bootless as she was determined to leave.
他试图说服她是徒劳的，因为她已决心离开。
2. The company's bootless attempts to improve sales resulted in a decline in revenue.
公司徒劳无功的提升销售的努力导致了收入的下降。