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
색전증은 혈관을 막아 심각한 건강 문제를 일으킬 수 있습니다.saekjeonjeungeun hyeolganeul mag-a simgakhan geongang munjeleul ilheul su issseubnida.Embolism can block blood vessels and cause serious health problems.