上游充通大￥ SHANGHAI JIAO TONG UNIVERSITY 1828,the discovery that biological molecules such as urea (could be synthesized from nonliving components, scientists have explored the chemistry of life. Many of the most fundamental mysteries of how living things function have now been solved.However,much remains to be investigated.(很多未知) the application of our tremendous knowledge of biochemistry to problems in medicine,agriculture, environmental sciences...(已知与应用的联系) One of the most startling discoveries of the past century:the great unity of all living things at the biochemical level所有生物在生化水平上的统一性1828, the discovery that biological molecules such as urea （尿素）could be synthesized from nonliving components, scientists have explored the chemistry of life. Many of the most fundamental mysteries of how living things function have now been solved. However, much remains to be investigated. （很多未知） the application of our tremendous knowledge of biochemistry to problems in medicine, agriculture, environmental sciences…….（已知与应用的联系） One of the most startling discoveries of the past century: the great unity of all living things at the biochemical level 所有生物在生化水平上的统一性