“Isis has already carried out numerous chemical weapons attacks in Syria; we know it wants to go further by carrying out a nuclear attack in the heart of Europe. This, combined with poor levels of security at a host of nuclear research centres in the former Soviet Union mean the threat of a possible ‘dirty-bomb’ attack on a Western capital is high,” said Moshe Kantor, the president of the International Luxembourg Forum.
여기서 This, combined with poor levels of security at a host of nuclear research centres in the former Soviet Union mean the threat of a possible ‘dirty-bomb’ attack on a Western capital is high,
동사가 뭐고, 의미르 어떻게 파악하나요.. ㅜ