红色三角形表示危险。
从绿色和平组织到忧思科学家联盟，世界银行和五角大楼都同意，全球暖化或许是对我们处于危险中的地球最严重的威胁。
Organizations from Greenpeace to the Union of Concerned Scientists, World Bank and the Pentagon, all agree that global warming is, perhaps, the most serious threat to our imperiled planet.
座落于伦敦海德公园角的皇家炮兵纪念碑是种种危险记忆的冰山一角，威胁着环绕这个岛屿的交通，把过往不愉快的事实摆在人们眼前。
The Royal Artillery Memorial at London's Hyde Park Corner is an iceberg of dangerous memories, menacing the traffic that circles its island, forcing unpleasant truths from the past into the present.
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