be unflagging
Her enthusiasm was unflagging.
她的热情丝毫不减。
不倦的；坚持不懈的；持续的
持续热情的,不倦的；不停的,持续的；不衰的；不屈不挠的；不松懈的
tireless; unceasing
持续热情的,不倦的
showing sustained enthusiastic action with unflagging vitality
不停的,持续的
unceasing
Her unflagging energy kept the whole team going through the long project.
她不倦的精力使整个团队在漫长的项目中坚持了下来。
用法提示：unflagging 作定语形容词修饰 energy，表示精力持续充沛、不减退。
Despite the heat, the volunteers showed unflagging enthusiasm for cleaning the beach.
尽管天气炎热，志愿者们对清理海滩表现出不懈的热情。
用法提示：unflagging 作定语形容词修饰 enthusiasm，强调热情始终不减。
His unflagging patience with the children made him a favorite teacher.
他对孩子们不厌其烦的耐心使他成为最受欢迎的老师。
用法提示：unflagging 作定语形容词修饰 patience，突出耐心持久不松懈。
Her enthusiasm was unflagging.
她的热情丝毫不减。
常见搭配：unflagging energy/enthusiasm/support/effort
He showed unflagging support for the team.
他对球队表现出了不懈的支持。
Despite the difficulties, his determination remained unflagging.
尽管困难重重，他的决心依然坚定不移。
grammar · medium
易错句子She worked unflagging on the project.
正确表达She worked unflaggingly on the project.
unflagging是形容词，不能修饰动词；应用副词形式unflaggingly来修饰动词work。
grammar · medium
易错句子He showed unflagging of enthusiasm.
正确表达He showed unflagging enthusiasm.
unflagging直接修饰名词enthusiasm，不需要介词of；这里错误地仿照‘a lot of’等结构加上了of。
unfailing 强调可靠、从不让人失望；unflagging 强调精力或努力持续不衰退，不松懈。
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