随着调查的深入，他们的整个计划开始瓦解。
Their whole plan started to ___unravel as the investigation went deeper.
他耐心地把缠在一起的毛线解开。
He patiently ___unraveled the tangled wool.
她正在拆开这件旧毛衣，想把毛线用来织围巾。
She is ___unraveling the old sweater to use the yarn for a scarf.
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