Without oxygen and nitrogen in the atmosphere, humans could not survive on Earth.
大气中如果没有氧和氮，人就无法生存于地球了。
| Expression | 大气中如果没有氧和氮，人就无法生存于地球了。 |
|---|---|
| Meaning | If it were not for oxygen and nitrogen in the air, no man could live on the earth. |
| Reading | dàqì zhōng rúguǒ méiyǒu yǎng hé dàn rén jiù wúfǎ shēngcún yú dìqiú le |
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