重力能使光线弯折，使巨大的星系团象望远镜一样，扭曲背景星系的图像，使之变得细长。
Gravity can bend light, allowing huge clusters of galaxies to act as telescopes, and distorting images of background galaxies into elongated strands.
聚丙烯波形板坚韧而空心的结构使之可以很容易地弯折和切割。
The toughness and hollow structure of Polypropylene Corrugated Sheet can easily be bent and cut.
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