元凶

• Poverty , disease and conflict have historically threatened food security
  贫困，疾病和战争一直以来都是造成食物紧张的元凶。
• Her father became the mayor of the city . he was a murderer in the second world war
  她的父亲，二次世界大战的元凶，竟当上了这个市的市长。
• “ unless the culprit behind these attacks is caught , it is likely the school will be closed
  “若不抓住这些袭击事件的元凶，学校很可能被关闭。 ”
• Scientists believe that an asteroid 10 to 20 kilometres in diameter produced this impact basin
  科学家相信造成这个陨石坑的元凶是一颗直径10至20公里的小行星。
• Most researchers around the world agree that green house gases are to blame for the disappearance of ice
  全世界大多数研究人员都认为，温室气体是冰雪消融的元凶。
• Others posited that dark matter was the culprit : it might exert a gravitational or drag force
  另有些人则断定暗物质才是惹祸的元凶：它可能会对太空船施加重力或阻力。
• It isn ' t pollution that ' s harming the environment . it ' s the impurities in our air and water that are doing it .
  “破坏环境的元凶并非污染，而是我们空气和水中的杂质。 ”
• Problems and their capabilities to detect the causes of the problems as well as suggest solutions
  他们除了要找出破坏环保的元凶及提供证据外，亦要建议改善的方案。
• Ozone is one of the greenhouse gases . does the depletion of ozone cause the global warming directly
  臭氧是造成温室效应的气体之一;那麽,臭氧的消耗是直接导致全球暖化的元凶吗
• The person responsible may be a stranger , but often it is a husband or someone else close to the victim
  虐待妇女的元凶可能是陌生人，但更多时候是她们的丈夫或是她们身边的人。