seam fat

例句：

1. 1. She carefully sewed the dress together with a seam fat.
   她小心翼翼地用缝纫线把连衣裙缝在一起。
2. 2.The tailor used a needle to mend the hole in her shirt.
   裁缝用针修补了她衬衫上的洞。
3. 3. The seam fat was so thin that it barely held the fabric together.
   缝纫线太细了，几乎无法将布料固定在一起。