For example, when you press a key in a word processor,the CPU will access one of these locations to retrieve bits of data. It could also modify them, or create new ones. The time this takes is known as [the] memory's latency. And because program instructions must be processed quickly and continuously, all locations within [the] short-term memory can be accessed in any order.
On the other hand, optical-based storage like DVD and Blu-ray also uses spinning discs, but with a reflective coating. Bits are encoded as light and dark spots using a dye that can be read by a laser. While optical storage media are cheap and removable, they have even slower latencies than [ _ ]magnetic storage and lower capacity as well.
私は [ _ ]の部分にthat of と入れたのですが、本文中にはthat of はありませんでした。