单词：high polymer waterproof materials
单词：high polymer waterproof materials 相关文章
I have a 45, it's 45 plus High SPF, high protection, right? En, not exactly. That SPF number indicates protection from burning UVB rays, but says nothing about blocking UVA rays which can cause wrinkle, sunspots, and cancer. Rules proposed today wou
万花筒2007年
Research Breakthrough for Biodegradable Tires? 研究人员研发完全可降解轮胎 Researchers say they have created a new synthetic rubber that could be used to make biodegradable tires. A team at Texas AM Universitys campus in the Gulf nation o
2016年VOA慢速英语(九)月
'Smart' Bandages Could Heal Wounds More Quickly 智能绷带有助更快治愈伤口 Simple bandages are usually seen as the first line of attack in healing small to moderate wounds and burns. But scientists say new synthetic materials with embedded
VOA标准英语2016年(二月)
This is Scientists American sixty seconds. I am Santy Graver. Got a minute? They are called button cells, coin cells or watch batteries. By any names, this tiny round batteries pose a choking danger to kids. And if a kid succeeds in swallowing a butt
2014年Scientific American(十一)月
By Steve Herman New Delhi 17 October 2009 Maldivian President Mohammed Nasheed signs a document calling on all countries to cut down their carbon dioxide emissions, in Girifushi, Maldives, 17 Oct 2009 In an effort to highlight climate change, the Ca
VOA标准英语2009年(十月)
Japan is looking into installing toilets and emergency drinking water in buildings' lifts in case people are trapped after earthquakes. 日本考虑在大楼电梯内配装马桶，并提供紧急饮用水，以备有人在地震后被困电梯时使用
阅读空间