定义一个类，怎么在新建这个类的时候，只赋值这个类中某几个属性

export default class ContactData { 
  public name: string; 
  public address?: string; 
  public telephony?: number; 
  public email?: string; 
  public remarks?: string; 
 
  constructor(name: string, address?: string, telephony?: number, email?: string, remarks?: string) { 
    this.name = name; 
    this.address = address; 
    this.telephony = telephony; 
    this.email = email; 
    this.remarks = remarks; 
  } 
}
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