독학하고 있는 한 학생입니다.지문을 읽다가 해석이 되지 않는 문장이 있어 질문합니다.the terrible famines which killed millions of people in ethiopia in the 1980s were primarily due to extreme deforestation and the ruinous effects of war; and the victims were inhabitants of remote villages who were too poor and too isolated to buy food from elsewhere.이게 한 문장입니다.제가 해석이 안되는 부분은 were primarily due to extreme deforestation and the ruinous effects of war 이 부분입니다.해설지에는 primarily를 해석을 안했던데. 안해도 되는지요?