igorstellar·10 か月前·議論All that is true except almost no sunglasses made with the glass lenses. It’s almost all plastic with UV shielding layer.
igorstellar·2 年前·議論Rotorwings are also not found in the nature yet they give us ability to navigate in a short distance 3D space better than fixed wing.
igorstellar·2 年前·議論it's a privacy feature. I don't want to share my name with someone who doesn't have my contact.