单词 | 臭氧含量 |
例句 | DEFINITIVE EXAMPLES 权威例句〔the stratosphere〕During the 1980s, the amount of ozone in the stratosphere above Europe decreased by about eight percent.20世纪80年代,欧洲上空平流层的臭氧含量降低了大约8%。剑桥高阶 |
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