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生命和自然世界的豐富多彩與無限魅力就在於那許許多多難解之謎,使我們不得不密切關注和發出疑問。我們總是不斷地去認識它、探索它。雖然今天科學技術日新月異,達到了很高程度,但對於那些無限奧秘還是難以圓滿解答。古今中外許許多多的科學先驅不斷奮鬥,一個個奧秘不斷解開,並推進了科學技術的大發展,但又發現了許多新的奧秘現象,又不得不向新的問題發起挑戰。科學技術不斷發展,人類探索永無止境,解決舊問題,探索新領域,這就是人類一步一步發展足跡。