After a fruitless morning sitting at his desk he had given up.他在书桌前徒劳地坐了一上午之后便放弃了。It was a fruitless search.搜寻工作毫无结果。Their search for the plane is fruitless.他们对飞机的搜寻是毫无结果的....

Arctium的音标：...

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effectually的音标：effectually的英式发音音标为：[ɪ'fektʃʊəlɪ]effectually的美式发音音标为：[ɪ'fektʃʊrlɪ]...