밖이라

In a sentence

• 밖이라서 바람이 많이 불어요.

  Because it's outside, the wind is blowing a lot.

  밖이라서 indicates that the reason for the wind blowing is being outside.

• 밖이라 그런지 소리가 잘 들리지 않네요.

  Since it's outside, I can't hear the sound distinctly.

  밖이라 그런지 connects the fact of being outside with the difficulty in hearing.

• 밖이라 특히 조심해야 해요.

  Because we're outside, we need to be particularly careful.

  밖이라 emphasizes being outside as the reason for carefulness.