与在早期摆钟中使用的原始形式不同，锚擒纵装置允许钟摆沿非常小的弧线运动。
Unlike the original form used in early pendulum clocks, the anchor escapement permitted the pendulum to travel in a very small arc.
坦桑尼亚早期的原始人类遗址，奥杜瓦伊峡谷是1911年，一名蝴蝶猎人掉进峡谷深处时发现的。
Olduvai Gorge, an early hominid site in Tanzania, was found by a butterfly hunter who literally fell into its deep valley in 1911.
从原始的小孔成像和早期惊人的彩色摄影，到20世纪的35mm的高科技，这些到了现在都已经过时，而相机也成为手机标配功能。
As cameras become standard features in cell phones a look at the history of photography
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