- noncontingent reinforcement
- 巧合: coincidence; by chance; by c ...
- 强化: strengthen; intensify; conso ...
- 组合强化: combinational reinforcement
- 巧合: coincidence; by chance; by coincidence 意外的巧合 curious coincidence; 只是巧合而已 a mere coincidence; 巧合姻缘 a match met by chance
- 偶合，巧合: coincidence; coincidev
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