In conclusion, people around the world should protect the water resources
总之，全世界的人都应当保护水资源
in conclusion 总之2
Our class came up with the idea to make better use of used materials
我们班的同学提出了这一想法，以更好利用废旧材料
come up with 提出；make (good) use of (充分) 利用3
Last but not least, we should make good use of water in our daily life
最后但同样重要的是，我们日常生活中应该充分利用水
last but not least 最后但同样重要的是4
As far as I'm concerned, riding bicycles is a good solution to air pollution
就我个人而言，骑自行车是一个解决空气污染的好办法
as far as … be concerned 就……而言；关于；solution to …… 的解决办法5
Littering makes our school dirty, and does harm to the image of our school
乱扔垃圾使我们的学校脏乱，并且有损学校的形象
do harm to / do
harm 伤害；对……有害6
Immediate actions should be taken to improve the environment
应当立即采取行动来改善环境
take immediate actions 立即采取行动；7
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