在纯粹地震学中，地面运动一般以振幅表示。
In pure seismology, the ground motion is generally expressed by its amplitude.
体育运动不应纯粹看成是娱乐。
像其他冒险运动一样，攀登者为了他们要攀登的山的美景和纯粹的生理和心理的挑战，要面对潜在的危险。
As much adventure as sport, climbers face the inherent dangers because of the beauty of the places they climb in and the pure physical and emotional challenge in these climbs.
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