curl yarn

例句：

1. 1. She is knitting a sweater for her grandson.
   她正在为她的孙子织一件毛衣。
2. 2.The yarn is soft and warm, perfect for winter wear.
   这种毛线柔软且温暖，非常适合冬季穿着。
3. 3. The woman was busy curling the yarn into balls.
   那位女士正忙着把毛线卷成球。