如何将List<Mono<String>>组合成一个大字符串？

import reactor.core.publisher.Mono;
import reactor.core.publisher.Flux;

public Mono<String> combineStrings(List<Mono<String>> monos) {
    return Mono.zip(monos, objects -> {
        StringBuilder sb = new StringBuilder();
        for (Object obj : objects) {
            sb.append(obj.toString());
        }
        return sb.toString();
    });
}

public Mono<String> exampleUsage() {
    List<Mono<String>> monos = new ArrayList<>();
    // 添加要组合的 Mono 对象到列表中
    monos.add(Mono.just("Hello"));
    monos.add(Mono.just(" "));
    monos.add(Mono.just("World"));

    return combineStrings(monos);
}