一件背心，就是一件毛衣背心，在春初、秋凉的时候ta就可以是你、我、她的伴侣。
我用的是漫步淘宝店的瑞士进口托斯卡花线5两（250克）成就了我这件背心。工具addi棒针3.5mm 胸围衣长我就不说了。
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