锯子的刀片在往复运动时发出刺耳的声音。

The blade of the saw makes a loud noise while ___reciprocating.

他送了我生日礼物，我也回赠了一份表达谢意。

He gave me a birthday gift, so I ___reciprocated with one to show my appreciation.

两国决定互相给予签证优惠。

The two countries decided to ___reciprocate visa benefits.