This animation depicts aspects of the haemoglobin molecules and the mutant form that causes the disease sickle cell anaemia. 这段影片展示了血红蛋白分子的外形和它的变异型，这种变异导致了镰刀形红细胞贫血症。
The well furred tail of fox-brush shape is set on just below the level of the topline, and is usually carried over the back in a graceful sickle curve when the dog is at attention. 尾巴上的毛很丰富，像狐狸尾巴，恰好位于背线之下，犬立正时尾巴通常以优美的镰刀形曲线背在背上。
