Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
이 안경은 광색성이 있어서 햇빛에 노출되면 색이 변합니다.I angyeongeun gwangsaekseong-i isseoseo haetbit-e nochuldoemyeon saek-i byeonhamnida.These glasses have photochromism, so they change color when exposed to sunlight.