fruitless

adj producing little or no result; unsuccessful 不结果实的; 无结果的; 不成功的; 无益的; 无效的: a fruitless attempt 无益的尝试 * Our efforts to persuade her were fruitless she didn't even listen. 我们怎麽劝她都没用--她连听都不听.

froze, frozen, FRS, fructification, fructify, fructose, frugal, frugality, frugally, fruit, fruit machine, fruit salad, fruit-cake, fruit-fly, fruit-knife, fruiterer, fruitful, fruitfully, fruitfulness, fruition, fruitlessly, fruitlessness, fruity, frump, frumpish, frustrate, frustrated, frustrating, frustration, fry, fry-up, fryer (also frier), frying-pan, frying-pan (US fry-pan), FT, fuchsia, fuck, fuck-all, fuck-up, fucker,