渔夫正在把捕获的鱼放回河里。

The fisherman is ___losing the caught fish back into the river.

他松开了腰带，感觉更舒服了。

He is ___loosening his belt to feel more comfortable.

猎人松开弓弦，向远处的狼群射出一箭。

The hunter is ___losing an arrow at the wolves in the distance.