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
호수의 현탁층은 물속의 미세한 입자들로 구성되어 있다.Hosuiui hyeontakcheung-eun mulsok-ui misehan ipjadeullo guseongdoeeo itda.The nepheloid layer of the lake is composed of fine particles in the water.