遗憾，懊悔
答复，回答
汇报，报告
报酬，赏金
regret [rɪ'gret] n. 遗憾；抱歉；悲叹 vt. 后悔；惋惜；哀悼 vi. 感到后悔；感到抱歉
regret to do对要做的事遗憾；regret doing对做过的事遗憾、后悔
eg: I regret that the United States has added its voice to such protests. 我很遗憾美国也附和了这样的抗议。
