相关单词同义词tough, trying, rough, 近义词 arduous 费力的, difficult 困难的, strenuous 奋发的, painful 痛苦的, hard 硬的, exacting 严格的, complicated 复杂难懂的, tiresome 令人厌倦的, exhausting 疲倦的, backbreaking 非常辛苦的, painstaking 辛苦的, protracted 延长的, lengthy 冗长的, tough 强硬的, punishing 艰难持久的, operose 费力的, grueling 折磨人的, toilsome 费力的, heavy 大(量)的, gruelling 繁重而累人的...临近词labour, laboratory, laboriously, laboriousness, laBorious Bees, laBorious style, laborious specialty, laborious test method, Laborious study or meditation.相似词labor-saving, laboratory, labored, laborer, labour, labour camp, Labour Day, labour force, 返回 laborious