地球上的大部分成分以熔化或汽化物质的形式存在。

Most of the earthly component would have been in the form of melted or vaporized matter.

youdao

这个谜题的答案在于早期光合生命形式的新陈代谢活动，这种活动缓慢但一定改变了地球大气的化学成分。

The answer to this riddle lies in the metabolic activity of early photosynthetic life-forms that slowly but surely transformed the chemical composition of Earth's atmosphere.

youdao

除了酪，您也会发现，许多所谓的“天然”食品含有味精的形式，酵母提取物，另一种骗人的成分中使用的许多天然食品。

Aside from casein, you'll also find that many so-called "natural" food products contain MSG in the form of yeast extract, another deceptive ingredient used in many natural foods.

youdao

That is, how many hamburgers do we think are being eaten and that's the food disappearing; how much of the foods are being consumed in processed products and the like, so that's a pretty gross estimate as well.

比如说,多少个汉堡包被吃了,那就是食物消费,有多少食品被,以加工好的成品等形式消费,所以其中估计的成分也很多

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选