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给生活带来方便的事物
You can describe something as a boon when it makes life better or easier for someone.
例句
It is for this reason that television proves such a boon to so many people...
就是因为这个原因，电视才会给这么多人带来如此大的便利。
This battery booster is a boon for photographers.
这种电池充电器是摄影工作者的好帮手。