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1·The dynamic element can be driven to generate the aspiration movement as soon as the tape spool rotates, so the number of the dynamic elements can be increased.

由于带盘每旋转一次动力元件都会驱动一下产生抽吸动作，因而还可增加动力元件的数量。

2·A device, such as a cylinder, spool, or frame, that turns on an axis and is used for winding and storing rope, tape, film, or other flexible materials.

卷轴：一种如卷筒、卷轴或框，绕轴旋转装置，用于卷起和贮存绳索、磁带、胶片或其它带弹性的物质。

3·On dictation equipment, a spool on which magnetic tape is wound.

在口述记录设备上，一种卷绕磁带的轴。

4·Spooling comes from the need to copy data onto a spool of tape for storage.

当文件被删除，碎片产生，数据随机分布在磁盘上。