regressv.倒退；回归；退化n.退回；回归；逆向思维regresslon test回归测试regress analysis回归分析regress argument回溯论证regressin effect回归效应Regressing nevus消退性痣regress function回归函数regressed offence退行型犯罪regressed offender退行型犯罪人Regressiou Testing回归测试regress prediction回归预测

1. I returned the appliance because it was defective.
   我退回了那件器具，因为它有毛病。
2. I would like to refund this blender.
   我想退回这果汁机。