Universal Serial Bus (USB) - 通用串行总线

Universal Serial Bus (USB) is an industry standard that establishes specifications for cables, connectors and protocols for connection, communication and power supply between personal computers and their peripheral devices. Released in 1996, the USB standard is currently maintained by the USB Implementers Forum (USB IF). There have been three generations of USB specifications: USB 1.x, USB 2.0 and USB 3.x; the fourth called USB4 is scheduled to be published in the middle of 2019.
通用串行总线 (USB) 是一种行业标准，它为个人计算机及其外围设备之间的连接，通信和电源建立电缆，连接器和协议的规范。USB 标准目前由 USB Implementers Forum (USB IF) 维护，于 1996 年发布。USB 规格有三代：USB 1.x，USB 2.0 和 USB 3.x，第四个名为 USB4 的计划于 2019 年中期发布。

1. Receptacle (socket) identification

Available receptacles for each connector

receptacle [rɪ'septək(ə)l]：n. 花托，容器，插座
deprecate ['deprɪkeɪt]：vt. 反对，抨击，轻视，声明不赞成
Low-speed，LS
Full-speed，FS
High-speed，HS
SuperSpeed，SS
SuperSpeed+，SS+

Two USB 3.0 Standard-A receptacles (left) and two USB 2.0 Standard-A receptacles (right) on a computer’s front panel.

2. USB Type-C (USB-C)

USB Type-C (USB-C) is a 24-pin USB connector system, which is distinguished by its two-fold rotationally-symmetrical connector.
USB Type-C (USB-C) 是一种 24 针 USB 连接器系统，其特点是双重旋转对称连接器。

USB-C plug

USB-C port (receptacle)

3. The type-A plug (left) and type-B plug (right)

Pin configuration of type-A and type-B plugs

4. The Mini-A plug (left) and Mini-B plug (right)

5. The Micro-A plug (left) and Micro-B plug (right)

6. USB 3.0 Micro-B SuperSpeed plug

7. Various USB connectors along a centimeter ruler for scale

From left to right:
Micro-B plug -- UC-E6 [a] -- Mini-B plug -- type-A receptacle [b] -- type-A plug -- type-B plug
[a] UC-E6 is a proprietary non-USB connector.
[b] Inverted, so the contacts are visible.

proprietary [prə'praɪət(ə)rɪ]：n. 所有权，所有人 adj. 所有的，专利的，私人拥有的
invert [ɪn'vɜːt]：vt. 使...转化，使...颠倒，使...反转，使...前后倒置 n. 颠倒的事物，倒置物，倒悬者 adj. 转化的

References