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
통각계는 신체의 통증을 감지하는 역할을 합니다.Tonggakgye-neun sinche-ui tongjeung-eul gamji-haneun yeoghal-eul hamnida.The pain perception system plays a role in detecting pain in the body.