• 1. optional port: 选择港 | 任意港 | 选卸港 | 指示提单
• 2. Optional Port Fees: 选港附加费
• 3. Optional Port Clause: 选港条款

更多释义

• 1.Creating an Mqtt client instance requires several parameters including a unique client ID, a broker IP address and port, and the optional MqttProperties object described previously.
  创建Mqtt客户实例需要几个参数，包括一个惟一客户机id、代理ip地址和端口以及可选的MqttProperties对象。
  dict.yoduao.com
• 2.DB9M-to-USB cable (optional if your host platform has an RS-232 port).
  DB9M - to - US b线缆(如果主机平台有RS - 232端口，它就是可选的)。
  dict.yoduao.com
• 3.The firm plans to offer optional solar-photoelectric systems, to be set up as a car port at home, that will be able to power the cars for 80km a day without having to draw on the grid.
  公司计划提供光电转能系统，即未来的太阳能车房能实现电驱车不必从电网取电一天跑80公里了。
  dict.yoduao.com

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