Dioxygen
二氧, 分子氧
🗣️ 情景例句
I'm serious, Philip.
我是认真的， Philip。
While (or Where) there is life there is hope.
留得青山在，不怕没柴烧。
who put his questions to nature instead of to the ancients,
他向自然界而不是向古人提出问题，