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The Basics of Freshwater: Crash Course Kids 14.1
4:16
YouTubeCrash Course Kids
The Basics of Freshwater: Crash Course Kids 14.1
We have a lot of water on Earth, but we also can't actually drink much of it... or use it for farming. That's because most of the water on Earth is saltwater. We humans, like a lot of living things, need freshwater to survive. In this episode of Crash Course Kids, Sabrina talks about the difference between freshwater and saltwater and why ...
已浏览 103.6万 次2015年6月9日
Water Clock History
The mind-blowing engineering of a 13th century clock controlled entirely by water
The mind-blowing engineering of a 13th century clock controlled entirely by water
upworthy.com
8 个月之前
This environmentally friendly clock is powered by water
0:51
This environmentally friendly clock is powered by water
MashableRyan Sedmak
已浏览 5 次2018年8月7日
How does a water clock work? - TimesMojo
How does a water clock work? - TimesMojo
timesmojo.com
2022年7月7日
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