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 과정에서 발생하는 부수물은 환경에 영향을 미칠 수 있다.I gwajeongeseo balseonghaneun busumul-eun hwan-gyeong-e yeonghyang-eul michil su itda.The byproducts generated in this process can affect the environment.