问如何执行依赖于两个可观测值的函数

EN

import { Component } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { forkJoin } from 'rxjs';

@Component({
  selector: 'my-app',
  templateUrl: './app.component.html',
  styleUrls: [ './app.component.css' ]
})
export class AppComponent  {

  constructor(private http: HttpClient) {}

  getGoogle() {
    return this.http.get('https://api.github.com/users/google');
  }

  getMicrosoft() {
    return this.http.get('https://api.github.com/users/microsoft');
  }

  ngOnInit() {
    forkJoin(
      this.getGoogle(),
      this.getMicrosoft()
    )
    .subscribe(
      res => console.log(res)
    )
  }

}