插脚引线

例句：

1. 1. The engineer carefully inserted the screw into the hole.
   工程师小心翼翼地将螺丝插入孔中。
2. 2. The carpenter used a guide to insert the bolts accurately.
   木匠使用一个导向器来准确地插入螺栓。
3. 3. The painter needed to insert the brushes into the canvas.
   画家需要将刷子插入画布中。