- ds degree of substitution
- 置换: displace; substitute; supers ...
- 度: surmise; estimate
- 芳基核置换度: degree of substitution for aromatic nucleus
- 置换: displace; substitute; supersede; substitution; replacement; permutation; transposition; transposing; replacing; metathesis; displacement 置换出来 cement out; 锌置换了稀酸中的氢。 zinc displaces the hydrogen of dilute acids
- 置换率；置换比: displacement ratio
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