如何防止我的可观察订阅针对每个发出的值再次运行？

import { Observable } from 'rxjs';
import { share } from 'rxjs/operators';

const observable = new Observable(observer => {
  console.log('Observable created');
  observer.next('Hello');
  observer.next('World');
});

const sharedObservable = observable.pipe(share());

sharedObservable.subscribe(value => console.log('Subscriber 1:', value));
sharedObservable.subscribe(value => console.log('Subscriber 2:', value));

Observable created
Subscriber 1: Hello
Subscriber 1: World
Subscriber 2: Hello
Subscriber 2: World

import { Observable } from 'rxjs';
import { publish } from 'rxjs/operators';

const observable = new Observable(observer => {
  console.log('Observable created');
  observer.next('Hello');
  observer.next('World');
});

const connectableObservable = observable.pipe(publish());

connectableObservable.subscribe(value => console.log('Subscriber 1:', value));
connectableObservable.subscribe(value => console.log('Subscriber 2:', value));

connectableObservable.connect();

Observable created
Subscriber 1: Hello
Subscriber 1: World
Subscriber 2: Hello
Subscriber 2: World

import { Observable } from 'rxjs';
import { shareReplay } from 'rxjs/operators';

const observable = new Observable(observer => {
  console.log('Observable created');
  observer.next('Hello');
  observer.next('World');
});

const sharedReplayObservable = observable.pipe(shareReplay(1));

sharedReplayObservable.subscribe(value => console.log('Subscriber 1:', value));
sharedReplayObservable.subscribe(value => console.log('Subscriber 2:', value));

Observable created
Subscriber 1: Hello
Subscriber 1: World
Subscriber 2: World