thread form

例句：

1. 1.The artist carefully threaded the needle through the fabric.
   艺术家小心翼翼地将针穿过布料。
2. 2. The scientist observed the microscopic threads of the cell.
   科学家观察细胞的微观丝状结构。
3. 3. The delicate threads of the tape were so thin that they could barely be seen.
   胶带的细丝非常薄，几乎看不见。