从装备更新的概念入手，简要介绍了几种装备更新的分析方法，如最低费用法、MAPI法、经济寿命法等。

Started with the conception of equipment renewal, several equipment renewal methods are introduced briefly, including lowest-fee method, MAPI method and economic lifetime method.

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全部OG 2卫星都将采用自动识别系统(ais)设计，可以接收和报告从装备了AIS的海上船只所发出的信息。

All OG2 satellites will be designed with Automatic Identification System (AIS) payloads to receive and report transmissions from AIS-equipped maritime vessels.

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在一个仅是从货架上就能买到立方体卫星装备的时代，我们怎么能相信头顶上的卫星是那些知道自己所为的人出于善意开发的呢？

In an era when you can simply buy a CubeSat kit off the shelf, how can we trust the satellites over our heads were developed with good intentions by people who knew what they were doing?

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We know already and we know last week from our demonstration of the floppy disks and such that there're various forms of memory inside of a computer.

大家上个星期应该从,软盘得知电脑上其实有,很多种存储装备。

哈佛公开课 - 计算机科学课程节选