1·Clear skies in late June 2010 provided plenty of unfiltered sunlight to melt snow and ice in the Arctic.
2010年6月下旬的晴朗天空提供了大量未过滤的阳光来融化北极的冰雪。
2·But you will never breath the natural air, you will never feel unfiltered sun light on your face.
但是您从未将呼吸自然空气，您从未将感觉在您的面孔的未过滤的太阳光。
3·Researchers believe some as-yet- unidentified ingredient (particularly in unfiltered coffee) could trigger the disease.
研究人员相信，一些还没有被确认的物质（尤其是未过滤的咖啡中），可能会引发这种疾病。