We have explained this being due to light in the red spectrum bending readily, so red light is bent first over the horizon by the gravity of Earth where light in the other spectrums is not so bend.
我们解释过这是由于红色光谱更容易弯曲，所以当其他光线还没怎么样时，红光首先由于地球的引力而沿着地球的曲线弯曲。
One of end of specimens, another end surface as inside surface as the lateral and bend it repeatedly until it breaks. record record slice bending times.
试片之一端表面作为内侧，另一端表面作为外侧而予以往复弯折，至试片损伤时记录弯折次数。
Can you bend down and touch your toes without bending your knees?
你能弯下腰不屈膝碰到你的脚趾吗？
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