too much of a good thing
US /tuː mʌtʃ əv ə ɡʊd θɪŋ/
UK /tuː mʌtʃ əv ə ɡʊd θɪŋ/
1.
好事过头, 过犹不及
something that is enjoyable or beneficial but becomes harmful or unpleasant if there is an excessive amount of it
:
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Eating chocolate is nice, but too much of a good thing can make you sick.
吃巧克力很好，但好事过头会让你生病。
•
Even a vacation can be too much of a good thing if it lasts for months.
即使是假期，如果持续数月，也可能是好事过头。