a boon to
collocation对……的恩惠；给……的福音
The new metro line is a boon to daily commuters.
新地铁线路对日常通勤者来说是一大福音。
好事；值得感激或适当珍惜的事物。
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好事；值得感激或适当珍惜的事物。；亚麻的木质部分,通过沤麻、碎茎和打麻作为废料与纤维分离。；作为恩惠或好处而请求或给予的东西；礼物或善行。；恩惠
A good thing; a thing to be thankful for or to appreciate duly.
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好事；值得感激或适当珍惜的事物。
A good thing; a thing to be thankful for or to appreciate duly.
亚麻的木质部分,通过沤麻、碎茎和打麻作为废料与纤维分离。
The woody portion of flax, separated from the fiber as refuse matter by retting, braking, and scutching.
作为恩惠或好处而请求或给予的东西；礼物或善行。
That which is asked or granted as a benefit or favor; a gift or benefaction.
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对……的恩惠；给……的福音
The new metro line is a boon to daily commuters.
新地铁线路对日常通勤者来说是一大福音。
极大的好处；巨大的恩惠
The grant proved a great boon to the small library.
这笔拨款证明是小图书馆的一大福音。
经济上的红利；对经济的福音
The festival has become an economic boon for the city.
这个节日已成为这座城市在经济上的一大福音。
受欢迎的恩惠；可喜的福音
The extra funding was a welcome boon to the little theatre.
这笔额外资金对小剧场来说是一个可喜的福音。
意外的好处；意外的收获
The old photograph was an unexpected boon for the genealogist.
这张老照片对系谱学者来说是一个意外的收获。
对……大有裨益；成为……的福音
The new library has been a boon to the students.
新图书馆对学生来说是一大福音。
福音与祸根；有利亦有弊
Working from home can be both a boon and a bane.
在家办公既可能是一大福音，也可能是一大祸根。
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boon 的 oo 像一双眼睛，收到恩惠时眼睛一亮，心存感激。
语域：formal 常见场景：正式写作、新闻报道或评论、公开演讲或陈述 作名词表示“恩惠；有益之物”时，多用于正式或书面语，通常出现在 be a boon to/for ... 结构中，说明某事物对某人或某事很有帮助；日常口语中较少使用。
boon, moon, soon, noon, spoon, and tune all rhyme, ending with the sound /uːn/. But watch out for lookalikes that sound different: bone /bəʊn/, born /bɔːn/, and bun /bʌn/.
Dictionary facts from ECDICT, WIKTIONARY.