当我尝试启动nginx时，出现以下错误消息：
Job for nginx.service failed because the control process exited with error code.
当我运行命令systemctl status nginx.service时，我看到了：
nginx.service - A high performance web server and a reverse proxy server
Loaded: loaded (/lib/systemd/system/nginx.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Wed 2020-07-01 16:51:57 UTC; 1min 53s ago
Docs: man:nginx(8)
Process: 27851 ExecStart=/usr/sbin/nginx -g daemon on; master_process on; (code=exited, status=1/FAILURE)
Process: 27842 ExecStartPre=/usr/sbin/nginx -t -q -g daemon on; master_process on; (code=exited, status=0/SUCCESS)
Jul 01 16:51:55 ubuntu-s-4vcpu-8gb-nyc1-01 nginx[27851]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Jul 01 16:51:55 ubuntu-s-4vcpu-8gb-nyc1-01 nginx[27851]: nginx: [emerg] bind() to 0.0.0.0:1935 failed (98: Address already in use)
Jul 01 16:51:56 ubuntu-s-4vcpu-8gb-nyc1-01 nginx[27851]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Jul 01 16:51:56 ubuntu-s-4vcpu-8gb-nyc1-01 nginx[27851]: nginx: [emerg] bind() to 0.0.0.0:1935 failed (98: Address already in use)
Jul 01 16:51:56 ubuntu-s-4vcpu-8gb-nyc1-01 nginx[27851]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Jul 01 16:51:56 ubuntu-s-4vcpu-8gb-nyc1-01 nginx[27851]: nginx: [emerg] bind() to 0.0.0.0:1935 failed (98: Address already in use)
Jul 01 16:51:57 ubuntu-s-4vcpu-8gb-nyc1-01 nginx[27851]: nginx: [emerg] still could not bind()
Jul 01 16:51:57 ubuntu-s-4vcpu-8gb-nyc1-01 systemd[1]: nginx.service: Control process exited, code=exited status=1
Jul 01 16:51:57 ubuntu-s-4vcpu-8gb-nyc1-01 systemd[1]: nginx.service: Failed with result 'exit-code'.
Jul 01 16:51:57 ubuntu-s-4vcpu-8gb-nyc1-01 systemd[1]: Failed to start A high performance web server and a reverse proxy server.
任何人都可以帮助我吗？