Every year nearly 30 million acres of fertile soil degrades into unusable desert land.

每年有近3000万英亩肥沃的土地退化为无法利用的沙漠。

But let's make sure it's really biodegrading and not just degrading into small pieces that nobody can see.

但我们要确保，这是真的生物降解，而不是将垃圾分解成没人能看见的小块。

This quickly degrades into another chemical, dimethyl sulphide, which generations of those subjected to unimaginative school lunches will instantly recognise.

该物质很快会降解为另一种化学物质--二甲基硫，闻到这种物质产生的气味会立刻让人想起千篇一律的学校午餐的气味。

I saw the world burning as it degraded into some sort of chaos.

我看到世界在燃烧, 因为它退化成某种混乱。

And recent scientific findings have shown that macroplastics also emit greenhouse gasses when they degrade into microplastics.

最近的科学研究表明，大塑料在降解为微塑料时也会排放温室气体。

These plastics, made mainly from fossil fuels, pose a significant risk to human health as they degrade into microplastics and contaminate food sources.

这些塑料主要由化石燃料制成，它们降解为微塑料并污染食物来源，对人类健康构成重大风险。

" Confounded brute! " cried the unhorsed horseman, suddenly degraded into a pedestrian, just as ashamed as a cavalry officer degraded to a foot soldier.

“混蛋！ ” 下马的骑兵喊道，他突然沦为行人，就像骑兵军官沦为步兵一样羞愧。