每日科技英文40: 存储设备(EEPROM/EPROM/DRAM

今日要点:

1. EEPROM、EPROM、DRAM概念
2. be动词及11种表语(中): 前5种

EEPROM（电可擦的，可编程的只读存储器）

Electrically Erasable, Programmable Read-Only Memory. (Pronounced"Double-E"-PROM.) A type of ROM that can be erased electronically.

• Electrically [ɪ'lektrɪklɪ]: 副词，用电地，与电有关地

• Erasable[ɪ'reɪsəbl]: 形容词，可被擦掉的

• Pronounce[prəˈnaʊns]: 动词，发音

电可擦的，可编程的只读存储器。一种ROM能被电擦除。

EPROM（可擦的，可编程的只读存储器）

Erasable, Programmable Read-Only Memory. A type of ROM that can be erased by exposing it to ultraviolet light. Once erased, an EPROM can be reprogrammed with the help of a device programmer.

• to expose...to...： 使...暴露在...

• ultraviolet light[ˌʌltrəˈvaɪələt]: 紫外光

• with the help of: 在...帮助协助下

一种可用紫外线擦除的存储器。一次擦除后，EPROM可以在设备编程器的帮助下被重编程。

DRAM（动态随机访问存储器）

Dynamic Random-Access Memory. A type of RAM that maintains its contents only as long as the data stored in the device is refreshed at regular intervals. The refresh cycles are usually performed by a peripheral called a DRAM controller.

• only as long as: 条件语句，只有(仅)在...条件下才...

• at regular intervals: 定期刷新

• be performed by： 由...来执行

动态随机访问存储器。一种RAM，存储在其设备中的数据被定期刷新时才能保存它的内容。刷新周期一般由一个叫DRAM控制器的外设完成。

今日语法小知识: be动词及11种表语(中)

1. 名词:
   He is a boy.
   他是个男孩

2. 名词性从句:
   The trouble with me is that I lack money.
   我的麻烦是缺钱

3. 名词性短语:
   The question is when to set out.
   问题是什么时候出发呢

4. 动名词:
   My hobby is collecting stamps.
   我的爱好是集邮

5. 动词不定式:
   My purpose here is to see you.
   我来这里的目的是为了见你