adjective 下载 🔗分享 吃力不讨好，徒劳无功。 (of a task) not appreciated or rewarded Examples : "The cleaning of the community garden was a thankless task; no one seemed to notice or appreciate the hours volunteers spent tending to the plants. " 清理社区花园真是吃力不讨好；没人注意到，也没人感激志愿者们花时间照料那些植物。 attitude character job value 与AI对话词汇游戏阅读练习
adjective 下载 🔗分享 忘恩负义, 不知感恩. (of a person) ungrateful or unappreciative Examples : "My brother is so thankless; he never expresses appreciation for the help I give him. " 我弟弟真是太忘恩负义了，我帮了他那么多，他从来都不表达感谢。 attitude character value moral person 与AI对话词汇游戏阅读练习
