skipped thread

例句：

1. 1.The needle skipped the stitches on the fabric.
   针在布料上跳过了针脚。
2. 2.The repairman found a missed thread in the seam.
   修理工在缝纫中发现了一根断线。
3. 3. The lost thread was difficult to find and mend.
   那根断线很难找到并且修复。