optional port meaning in Chinese
任意港
选卸港
选择港
选择港,任意港
选择港（任意港）
自由港
Examples
- If it is difficult to state definitely one or several ports, optional ports can be adopted .
假如难以明确写出一个或几个港口，就可以采用选择港这个办法。 - Should process . a uri prefix string is composed of a scheme http or https , a host , an optional port , and an optional path
Uri前缀字符串由方案（ http或https ） 、主机、可选端口和可选路径组成。