shear of magnetic field lines

例句：

1. 1. The shearingof the sheep is a traditional activity inthis region.
   这个地区的剪羊毛是一种传统活动。
2. 2. The shearing machine is usedto cut the wool from sheep.
   剪羊毛机用于从羊身上剪下羊毛。
3. 3.The shearing process involves cutting offthe wool and leaving the skin behind.
   剪毛过程包括剪掉羊毛并留下皮毛。