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to phrases
clean air
['kli:n 'ɛə]
avia.
洁净空气
ecol.
清洁空气
tech.
纯洁空气
wind.
洁净大气
English thesaurus
Clean Air
['kli:n 'ɛə]
USA
CA
clean air
:
49 phrases
in 17 subjects
Automobiles
11
Aviation
1
Business
2
Earth sciences
2
Ecology
2
Economy
2
Electronics
4
Environment
6
General
1
International trade
1
Metallurgy
1
Oil / petroleum
1
Oil processing plants
2
Refrigeration
2
Space
1
Technology
7
Wind Energy
3
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