The Number property indicates the physical slot number, which can be used as an index into a system slot table, whether or not that slot is physically occupied.

因此，可以用相对记录号加上文件起始地址的方法算出任意一个记录的物理位置。（记住：文件的起始地址是当文件被打开时，从磁盘的索引中得到了）。

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Updates each page of the block so that it appears empty (the physical data remains, but their slot directory entries are set to deleted).

更新块中的每个页，使之看上去为空(物理数据仍然在，但是它们的slot目录项被设为已删除)。

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Common slot machine market confusion, product quality is not guaranteed, no relevant certificate, the user directly to the physical threat?

普通开槽机市场混乱，产品质量没保证，没相关证书，对使用者直接造成身体威胁？

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This move to a better screen, all-flash storage and the elimination of a physical slot for discs shifts the company ahead in its typical, pack-leading style.

WSJ: A Laptop Screen That Promises an Eyeful

Moving also requires shifting institutional thought, especially the idea in education that physical exercise is in competition with academics for a slot in the curriculum instead of an essential ingredient of academic performance that begins with increasing general physical activity.

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The pin layout is similar to the existing cards, and a physical adaptor will allow the Nano-SIM to slot into a larger micro or regular SIM slot.

FORBES: Apple's Nano-SIM Victory Solves a Problem That Doesn't Exist