heretofore

🇬🇧/ˌhɪətuˈfɔː(r)/ 🇺🇸/ˌhɪrtuˈfɔːr/
📚 16877 GRE sat
Heretofore means "before this time" or "up to now." 此前; 迄今

adverb [关系副词] 直到此时,迄今为止;在这以前

They reported that clouds are an important and heretofore uninvestigated contributor to the climate. 他们报告说,云是影响气候的一个重要因素,但迄今尚未进行过调查研究。

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