This was a long, thin and flexible strip of magnetic material, stored in reels.

这是一条长而薄的柔性磁性材料条，存储在卷轴中。

This was a metal cylinder – called a drum – coated in a magnetic material for recording data.

这是一个金属圆筒 - 称为鼓 - 涂有磁性材料用于记录数据。

The spiral bots also contained magnetic material which meant the researchers could drive them forward backward left or right with a magnetic field.

螺旋机器人还包含磁性材料，这意味着研究人员可以用磁场驱动它们向左或向右前进。

A magnetic field is used to magnetise the substance creating a magnetic material that can be printed into any shape And, the direction of the magnetic field can be changed during printing.

磁场用于磁化物质， 形成一种可以打印成任何形状的磁性材料，并且磁场的方向可以在打印过程中改变。