Windows – Error when using apt install in Ubuntu shell of Windows 10

I was trying to get python and set up an environment to work on the upcoming project.

In Windows 10 Ubuntu bash, I run the following command successfully:

sudo wget https://www.python.org/ftp/python/2.7.6/Python-2.7.6.tgz

Then I unzipped it and type in some other commands too, until I found that I need gcc in one particular step which I didn't have. So I try the following command:

sudo apt install gcc

But then it failed with the following error messages:

Err:1 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 binutils amd64 2.26.1-1ubuntu1~16.04.4
  Could not connect to archive.ubuntu.com:80 (2001:67c:1560:8001::14). - connect (111: Connection refused) [IP: 2001:67c:1560:8001::14 80]
Err:2 http://security.ubuntu.com/ubuntu xenial-security/main amd64 libc-dev-bin amd64 2.23-0ubuntu9
  Unable to connect to archive.ubuntu.com:http: [IP: 2001:67c:1560:8001::14 80]
Ign:3 http://security.ubuntu.com/ubuntu xenial-security/main amd64 linux-libc-dev amd64 4.4.0-96.119
Ign:4 http://security.ubuntu.com/ubuntu xenial-security/main amd64 libc6-dev amd64 2.23-0ubuntu9
81% [Connecting to security.ubuntu.com (91.189.88.161)]
Err:2 http://security.ubuntu.com/ubuntu xenial-security/main amd64 libc-dev-bin amd64 2.23-0ubuntu9
  Unable to connect to archive.ubuntu.com:http: [IP: 2001:67c:1560:8001::14 80]
Err:3 http://security.ubuntu.com/ubuntu xenial-security/main amd64 linux-libc-dev amd64 4.4.0-96.119
  Unable to connect to archive.ubuntu.com:http: [IP: 2001:67c:1560:8001::14 80]
Err:4 http://security.ubuntu.com/ubuntu xenial-security/main amd64 libc6-dev amd64 2.23-0ubuntu9
  Unable to connect to archive.ubuntu.com:http: [IP: 2001:67c:1560:8001::14 80]
E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/b/binutils/binutils_2.26.1-1ubuntu1~16.04.4_amd64.deb  Could not connect to archive.ubuntu.com:80 (2001:67c:1560:8001::14). - connect (111: Connection refused) [IP: 2001:67c:1560:8001::14 80]

E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/g/glibc/libc-dev-bin_2.23-0ubuntu9_amd64.deb  Unable to connect to archive.ubuntu.com:http: [IP: 2001:67c:1560:8001::14 80]

E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/l/linux/linux-libc-dev_4.4.0-96.119_amd64.deb  Unable to connect to archive.ubuntu.com:http: [IP: 2001:67c:1560:8001::14 80]

E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/g/glibc/libc6-dev_2.23-0ubuntu9_amd64.deb  Unable to connect to archive.ubuntu.com:http: [IP: 2001:67c:1560:8001::14 80]

E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

I am not familiar with it and it seems to me that it is some kind of connection problem. Why I am encountering this failure and how may I solve it? Any suggestion is appreciated!