In my opinion, we should limit the number of cars and plant more trees to purify the environment.
我认为，我们应限制汽车数量，并植树造林以优化环境。
What's more, we should plant more trees and flowers to purify the air.
更重要的是，我们应该种植更多的树木和花草，净化空气。
The author also has seen a few can purify airy article about the plant.
笔者也看到过一些关于植物能净化空气的文章。
This paper uses floating beds to plant cannas to purify heavily-polluted water in north gate section of Xi'an moat.
以西安护城河污染较严重的北门段水体为研究对象，利用浮床技术种植美人蕉净化重污染水体。
Trees are to purify the air and overtime, do not let the green plant closings.
树木正在为净化空气而加班加点，请勿让绿色工厂倒闭。
Trees are to purify the air and overtime, do not let the green plant closings.
树木正在为净化空气而加班加点，请勿让绿色工厂倒闭。
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