Climate Strike -- Good, Cheap, Fast (week 74)
Daily Kos,
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Gigahertz femtosecond lasers are suited to enhance and regulate laser machining quality to engineer the physicochemical…
“This is a simple, durable, inexpensive way to address the global water crisis, especially in developing nations”Chunlei Guo A…
水是地球上所有生命体赖以生存的重要资源,也被称为“生命之源”。一个人不吃饭,依靠自己体内贮存的营养物质可以活上一个月。但是如果不喝水,连一周时间也很难度过。人体内失水10%就会威胁健康,失水20%就有生命危险,足可见水对生命的重要意义。随着水污染的日益严重…