科学研究   

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What septic systems don't do, and to which they are not designed to do, is remove pretty much anything from the waste stream. In contrast, sewer systems capture all home wastewater and deli...

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Imagine if our night sky looked like this. Looks cool, doesn't it? Well, what's not cool, is that you'd have to live your life without electricity, cars, rockets, jewelry, or you cell phone. Thi...

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There's going to be bad smells. There's going to be fish kills. There's going to be a lot of algae getting entangled in your boat, in your propeller. And it's not a nice view. So in a ...

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(gentle music) - [Narrator] It's known as Earth's evil twin. - Venus gives us a glimpse into both our past and our future, a past where water formed and perhaps life arose before it d...

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The company was set up by Kripa Varanasi and Vishnu Jayaprakash in 2020 to commercialise a new type of spray nozzle. The problem, says Dr Varanasi, an expert in the behaviour of liquids, was that t...

该公司由克里帕·瓦拉纳西和毗湿奴·贾亚普拉卡什于2020年成立，旨在将新型喷嘴商业化。液体行为专家瓦拉纳西博士说，问题在于他们需要将喷嘴的性能与现有技术的性能进行比较。 由于此类数据几乎不存在，他们开始自己收集。贾亚普拉卡什博士在印度...

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The world is awash in pesticides. Fully 3m tonnes are thought to be sprayed onto crops worldwide every year, of which only a small fraction are needed. The excess chemicals are known to run off ont...

世界上充斥着农药。全世界每年向农作物喷洒的农药达300万吨，但实际需要的只是其中的一小部分。众所周知，过量的化学物质会渗入日益脆弱的土地，渗入水道，破坏环境，影响健康。农用化学品的使用持续增长：根据大型研究集团S&P Global Comm...

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Imagine an entire network of flying cars zooming around at 2,000 meters above our congested city streets. Your morning commute would be a lot different up there: you could travel at higher speeds, ...

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What if there are thousands of alien empires in the Milky Way, each spanning a few to maybe tens of star systems, chatting, trading, sometimes shooting or ignoring each other politely?...