1.Although she did not reciprocate his feelings, she did not discourage him.
有回应的感情，有使丧失信心。
2.They reciprocated hospitality.
们互相款待。
3.He reciprocated my good wishes.
答谢了我的祝福。
4.The tribophysics of the cylinder liner—piston rings in an internal combustion engine is a typical tribological system with the reciprocating motion and the impacting motion.
内燃机缸套——活塞环摩擦副系统是一个集往复、冲击于一体的典型的摩擦学系统。
5.Second process: After operated by the front forward gas baffler, the paper reciprocates to the drum of the second layer to perform flanging of the backside.
纸张经后推气挡板之作用，再往复至第二层滚筒完成前边折边。
6.Third process: After operated by the back forward gas baffler, the paper reciprocates to the drum of the third layer to perform flanging of the front side.
有回应
的感情，
