buttless thread

例句：

1. 1. The needle is buttless thread, so it won't break easily.
   这根针是无结线，所以不容易断。
2. 2. She used buttless thread to sew the dress together.
   她用无结线缝制了这件连衣裙。
3. 3. The embroidery was done with buttless thread, which made it look more delicate.
   这幅刺绣是用无结线完成的，这使得它看起来更加精致。