英仙座流星在英格兰南部威尔特郡索的尔兹伯里市巨石阵的新石器时代纪念碑上面的越过明星上形成条纹。
Photo and caption by kieran dohertyA Perseid meteor streaks past stars over the neolithic monument of Stonehenge in Salisbury, wiltshire, southern England.
塔特尔彗星在太阳系里飞奔时，留下了一路碎片，漂浮在一片区域中，当地球运转进入这片区域时，仙英座流星雨就爆发了。
The Perseids occur when Earth runs into pieces of debris floating in the solar system that were left behind by Comet Swift-Tuttle.
结论：达芙文联合特丽仙治疗中至重度寻常痤疮的疗效比单用特丽仙的效果好。
Conclusions:Differin gel used in combination with dalacin T is more effective compared with dalacin T alone in the treatment of acne vulgaris.
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