useful同义词答:同义词 favourable, useful, valuable, helpful, profitable, benign, wholesome, advantageous, expedient, salutary, win-win, healthful, serviceable, salutary general-purpose serviceable useful 英[ˈjuːsfl]美[ˈjuːsfl]useful汉语翻译:a. 有用的, 有益的【机】有用的, ...