251.dispel the mist and explain many phenomena that we thought of as mysteries in the past
252.both the senior citizens and the youth
253.Only this way can the essence the of traditional culture be inherited as it should be.
254.Zoos provide recreation and refreshment for fatigued urban dwellers.
255.dreamlands for small children
256.dragon's descendants 龙的传人
257.add to their knowledge something they will never acquire in the classroom
258.research facilities
259.gradually rises to 10% at 8:00 and maintains the same for the next 2 hours
260.There is ... increase ... ,however, after that it drops.
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