但防窥膜同样有很多弊端，除了作为一张钢化膜给手机增重增厚之外，防窥的效果和品质也非常受到光栅加工工艺的限制——
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In the Air Force, she stood out from the crowd and was selected to join the astronaut programme. She was to fly Space Shuttles - Nasa's reusable "space planes".