equivalence       
noun [ U ]  formal uk/ɪˈkwɪv.əl.əns/ us/ɪˈkwɪv.əl.əns/ (also equivalency, uk/ɪˈkwɪv.əl.əns.i/ us/ɪˈkwɪv.əl.əns.i/)
 相等,对等,相同
the fact of having the same amount, value, purpose, qualities, etc.
  There's a general equivalence between the two concepts. 这两个概念大体上是相同的。 
 I don’t see any moral equivalence between the two sides. 我不认为双方的道德水平有可比性。 
 See: equivalent
 - More examples
 - Somewhere between print and enunciation, the equivalence between sound and sense can get lost.
 - It's probably a mistake to think of the two operating systems in terms of equivalence.
 - Patients often question generic drugs' equivalence to the brand-name drugs.