这个地方的空气，在春天和初夏都非常清新，而现在却变得呆滞和使人困倦了。
The air of the place, so fresh in the spring and early summer, was stagnant and enervating now.
有了更多的树和草地，空气也变得清新了。
The air there has become more fresher with more trees and grass.
有了更多的树和草地，空气也变得清新了。
The air there has become more fresher with more trees and grass.
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