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 물질은 액화하는 과정에서 많은 열을 방출합니다.i muljil-eun aekhwa haneun gwajeong-eseo manheun yeol-eul bangchulhamnida.This substance releases a lot of heat during the liquefying process.