39.致力于/投身于

　　be committed / devoted to…

　　40.應(yīng)當(dāng)承認(rèn)

　　Admittedly，

　　41.不可推卸的義務(wù)

　　unshakable duty

　　42.滿足需求

　　satisfy/ meet the needs of…

　　43.可靠的信息源

　　a reliable source of information

　　44.寶貴的自然資源

　　valuable natural resources

　　45.因特網(wǎng)

　　the Internet(一定要由冠詞，字母I大寫)

　　46.方便快捷

　　convenient and efficient

　　47.在人類生活的方方面面

　　in all aspects of human life

　　48.環(huán)保(的)

　　environmental protection / environmentally friendly

　　49.社會(huì)進(jìn)步的體現(xiàn)

　　a symbol of society progress

　　50.科技的飛速更新

　　the ever-accelerated updating of science and technology

　　51.對(duì)這一問(wèn)題持有不同態(tài)度

　　hold different attitudes towards this issue

　　52.支持前/后種觀點(diǎn)的人

　　people / those in fovor of the former/ latter opinion

　　53.有/提供如下理由/證據(jù)

　　have/ provide the following reasons/ evidence

　　54.在一定程度上

　　to some extent/ degree / in some way

　　55.理論和實(shí)踐相結(jié)合

　　integrate theory with practice

　　56.…必然趨勢(shì)

　　an irresistible trend of…