They enter our atmosphere traveling 45 miles a second and burn up in brilliant streaks of light 这些碎片以每秒钟45英里的速度穿过地球大气层,与大气层摩擦燃烧,在天空中留下一道道耀眼的光亮。
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Most particles are smaller than a grain of rice . they enter our atmosphere traveling 45 miles a second and burn up in brilliant streaks of light 这些碎片以每秒钟45英里的速度穿过地球大气层,与大气层摩擦燃烧,在天空中留下一道道耀眼的光亮。