joyful的反义词有：sorrowful, sad, grievous, grievous, sorrowful, sad。adj.joyful的反义词（欢喜的）：sorrowful, sad, grievous。joyful的反义词（其他释义）：grievous, sorrowful, sad。...
He programmed his computer to compare all the possible combinations.他给他的计算机编制了一套程序，以比较所有可能的组合。They agreed to work co-operatively to ease tensions wherever possible.他们同意互相配合尽一切努力缓解紧张局势。It was imperative that he act as nat...