plus strand

例句：

1. 1. The plus strand is used to reinforce the structure of the fabric.
   加长丝线用于加固织物的结构。
2. 2.The plus strand was added to enhance the durability of the material.
   加长丝线被添加以增强材料的耐用性。
3. 3.The plus strand was used to create a seamless seam in the garment.
   加长丝线用于制作衣物中的无缝接缝。