41-50 组
41 不可推卸的义务
an indispensable duty
42 满足需求
satisfy/ meet the needs / requirements of...
43 宝贵的自然资源
valuable natural resources
44 方便快捷
convenient and efficient
45 在人类生活的方方面面
in all aspects of human life
46 社会进步的体现
a symbol of society progress
47 科技的飞速更新
the accelerated updating of science technology
48 有/提供如下理由/证据
have/ provide the following reasons/ evidence
49 在一定程度上
to some extent/degree / in some way
50 理论和实践相结合
integrate theory with practice / apply theory to practice