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A、方法比知識(shí)更重要
B、科學(xué)知識(shí)是點(diǎn)成的金，量終有限；科學(xué)方法則是點(diǎn)石成金的手指，可以產(chǎn)生無(wú)窮的金
C、知之者不如好之者，好之者不如樂(lè)之者
D、科學(xué)家不是因?yàn)橛杏貌叛芯孔匀坏?，他們研究自然是因?yàn)樗麄儚闹械玫搅丝鞓?lè)

A.I am very pleased to have this opportunity to....
B.First let me express my gratitude 
C.Now after a short introduction I would like to read to the main part of my paper...
D.The last part of my report will be devoted to....