It is ... that ... は日本人がよく使いたがるが、実際は1論文に1文程度しか使われない。 同じ言葉の副詞を使うほうが好ましい。
例) It is clear that the atmospheric CO2 is responsible for global warming. →Clearly,the atmospheric CO2.... It is concluded that → Concludingly It is reported that → Reportedly
参考文献