Level A1 : READ LISTEN TRANSLATE RANDOM
Level A2 : READ LISTEN TRANSLATE
Level B1 A: READ LISTEN TRANSLATE
Level B1 B: READ LISTEN TRANSLATE

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essential component wesentlicher Teil essentieel onderdeel composante essentielle componente essenziale componente esencial องค์ประกอบที่สำคัญ thành phần thiết yếu 重要组成部分
essential part wesentlicher Bestandteil essentieel deel partie essentielle parte essenziale parte esencial ส่วนสำคัญ phần thiết yếu 重要组成部分

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Compounds:

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HSK5000 A1+A2+B1

HSK5000 B2 + C1