- binary; dual; dualistic
- 二: two
- 元: first; primary
- 二元胺: dia mine; diamine
- 二元醇: diatomic alcohol; dibasic alcohol; dibastic alcohol; dihydric alcohol; dihydroxy alcohol; diol; divalent alcohol; glycol
- 二元的: bibasic; bidimensional; binaer binary; bivariate; dibasic; dualistic; dyadic; two dimensional; two-component
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