End-to-end encryption and privacy controls.
Message and call for free* around the world.
Group conversations made simple.
Say it with stickers, voice, GIFs and more.
Reach your customers from anywhere.
나노 미터 크기의 양자점 반도체 성능 저하의 새로운 원인 : 동아 사이언스 https://aju.news/517505.html