1. Beijing has reported four blue sky days so far in April, challenging the target of achieving 230 clean air days a year.
2. The announcement coincided with news that the city is only two " blue sky " days away from hitting this year's target of 266 clear days.
3. The cool mountain air was clear, clean and the sky a deep clear blue.
4. A cloudless blue sky made the granite cliffs appear deep pink and the greenery clean and vivid.
5. Money made Li become the sole coal supplier to the Blue Sky Heating Company, and also a major supplier to the Beichen Heating Power Plant.
6. The background is the red wall in dim light and the dark blue sky.
7. The student deaths have cast a shadow over the blue spring sky and have forced more students and teachers to focus on this disturbing trend.
8. The skies have become much clearer and I can see the drifting clouds clearly in the deep blue sky.
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9. These measures are dedicated to the eradication of air pollution and the reappearance of blue sky.
10. the blue sky
10. An old saying gives an exaggeration, " Climbing the mountains in Sichuan is as difficult as reaching the blue sky ".