佳能的这款单反相机专用折反镜头采用了一组折反镜片，以及一个跟棺材差不多大的镜身，其焦距被拓展到5150 mm。
Using a group of mirrors and a housing that's almost big enough to use as a coffin, Canon was able to stretch the focal-length on this SLR-specific lens to 5,150mm.
控制组的老鼠表现出比目鱼肌质量和力量下降，胰岛素抵抗上升，骨密度和抗折能力降低。
The control group showed a decrease in soleus muscle mass and strength, the development of insulin resistance, and a loss of bone mineral density and resistance to breakage.
结果：各实验组抗折能力均低于对照组。
Results: compared with control group, the fracture resistance in the experimental groups were lower.
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