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单词 ozone layer
释义
Ozone Layer
nnoun.objecta layer in the stratosphere (at approximately 20 miles) that contains a concentration of ozone sufficient to block most ultraviolet radiation from the sun
Synset:ozonosphere
Part Holonyms:stratosphere
Hypernyms:layer
Inherited Hypernyms:ozone layerlayerregionlocationobjectphysical entityentity
Part Meronyms:ozone hole
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