n.选择器；指示器

The model number serves as the primary designator for the product.
该型号作为产品的主标识符。
Each component on the circuit board has a unique designator, such as R1 for a resistor.
电路板上的每个组件都有一个唯一的标识符，如电阻器R1。
In military aircraft, the tail designator often identifies the unit or base it belongs to.
在军用飞机中，尾部标识通常表示它所属的单位或基地。
The file extension .docx is a common designator for Word documents.
文件扩展名.docx是Word文档的常见标识。
Each satellite in the GPS system has a specific designator code for tracking purposes.
GPS系统中的每颗卫星都有一个特定的跟踪代码作为标识。
In programming, variable names act as designators for memory locations storing data.
在编程中，变量名充当存储数据的内存位置的标识符。
The street name and house number function as a designator for a specific address.
街道名称和门牌号共同作为特定地址的标识。
For ships, the hull classification symbol is a unique designator indicating its type and role.
对于船只来说，船体分类符号是表明其类型和角色的独特标识符。
In a network, IP addresses serve as unique designators for each connected device.
在网络中，IP地址作为每个连接设备的唯一标识符。
The serial number on electronic devices is a distinctive designator, allowing for individual tracking and identification.
电子设备上的序列号是一个独特的标识符，便于进行单独追踪和识别。