《Operating System Concepts》學習第 62 天，p735-p737 總結，總計 3 頁。

一、技術總結

1.distributed system

(1)定義

A collection of loosely coupled nodes interconnected by a communication network(一組通過通信網絡相互連接的松散耦合節點)。

(2)打造分布式系統的原因

resource sharing、computation speedup、reliability。

2.network structure

local-area networks (LAN)、wide-area networks (WAN).

二、英語總結(生詞：3)

1.interconnect

(1)interconnect: inter-(“between, among”) + connect

vi/vt. connect with each other.

(2)示例

To completely understand the roles and types of distributed systems in use today, we need to understand the networks that interconnect them(《Operating System Concepts》第 735 頁)。

(3)connect vs interconnect

1)connect is used for two object.

2)interconnect is used for multiple objects.

2.emerge

(1)emerge: e-(“out”) + mergere(“to dip, sink”)

vi. emerge literally means “to rise out from liquid”, appear(出現)。

(2)示例

Local-area networks emerged in the early 1970s as a substitute for large mainframe computer systems(《Operating System Concepts》第 736 頁)。

3.ubiquitous

(1)ubiquity: ubi-(“where”) + -quity(“a suffix indicating state or quality”)

u.the fact of being everywhere。

(2)ubiquitous: ubiquity + -ous

adj. being everywhere(“無處不在”)。

(3)示例

WiFi is now ubiquitous and either supplements traditional Ethernet networks or exists by itself(《Operating System Concepts》第 737 頁)。

關于英語的注解同步更新匯總到 https://github.com/codists/English-In-CS-Books 倉庫。

三、其它

近來感冒，頭痛欲裂，不想看書。

四、參考資料

1. 編程

(1) Abraham Silberschatz，Peter Baer Galvin，Greg Gagne《Operating System Concepts》：https://book.douban.com/subject/30272539/

2. 英語

(1) Etymology Dictionary：https://www.etymonline.com

(2) Cambridge Dictionary：https://dictionary.cambridge.org

歡迎搜索及關注：編程人(a_codists)