knotter hook pinion

例句：

1. 1. The knotter skillfully tied the rope around the tree.
   那个结绳者巧妙地把绳子绕在树上。
2. 2. The knotter was skilled at creating intricate knots.
   那个结绳者擅长制作复杂的结。
3. 3. The knotter had to untie the rope from the tree before they could climb down.
   他们必须先解开绳子才能从树上爬下来。