她耐心地解开毛衣上缠结的毛线。

She patiently worked on ___unraveling the tangled yarn from her sweater.

科学家们正在逐步解开这个古老文明的谜团。

Scientists are slowly ___unraveling the mysteries of this ancient civilization.

长时间的争吵开始让他们的婚姻关系逐渐瓦解。

Their marriage started ___unraveling after years of constant arguments.