50.科技的飞速更新 the ever-accelerated updating of science and technology

49.社会进步的体现 a symbol of society progress

48.环保(的) environmental protection / environmentally friendly

47.在人类生活的方方面面 in all aspects of human life

46.方便快捷 convenient and efficient

45.因特网 the Internet (一定要由冠词，字母I 大写)

44.宝贵的自然资源 valuable natural resources

43.可靠的信息源 a reliable source of information

42. 满足需求 satisfy/ meet the needs of…

41.不可推卸的义务 unshakable duty