| 例句 |
adjective a fruitless attempt/search徒然的尝试／搜查 Our efforts to persuade her proved fruitless. 我们努力说服她，但毫无成效。 All the signs were that this was going to be a fruitless exercise. He abandoned his fruitless attempts to get his poems published. He returned home after weeks of fruitless negotiations. The search proved fruitless. They were three weeks into an apparently fruitless investigation. |