上文提到

1.
It is mentioned that
... It is observed that… 可以看出……;据观察…… It is mentioned that… 据说……;上文提到…… It doesn’t follow that… 未必…… ...
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Definition:
Category:AllAll,OralOral,WrittenWritten,TitleTitle,TechnicalTechnical
Source:AllAll,DictionaryDictionary,WebWeb
Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard