单词：biodegradablesurfactant
单词：biodegradablesurfactant 相关文章
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. The common method of closing a surgical incision is simply to stitch the patient up. There are some issues, though. Good stitching can be challenging,
Scientific American(四)月
Asia's plastic industry is growing, with China and India challenging established producers such as Thailand. Now, there is increasing attention to the environmental impact of plastics. Both environmentalists and industry executives agree biodegradabl
VOA标准英语2010年(二月)
Surfers' Helping Hands Impact Beach Communities It's not uncommon for surfers to travel the world chasing the best waves. But what is out of the ordinary is how members of Surf for Life pass the time when they're not out on the water. Instead of kick
VOA标准英语2011年(十一月)
An ant once leaned too far over the edge of a fountain and fell in-to the water．A dove was watching from a tree nearby．She saw that the ant could not swim so she plucked off a leaf and threw it down to him．He managed to scramble onto it and in
趣味英语
One cold，frosty day in the middle of winter a colony of ants was busy drying out some grains of corn which had grown damp during the wet autumn weather．A grasshopper，half dead with cold and hunger，came up to one of the ants．Please give me a
趣味英语
An ant and a fly were contending heatedly who was of greater importance．The fly was the first to begin：Can you possibly compare with my endowments？When a sacrifice is made，I am the first to taste the entrails that belong to the Gods．I pass
趣味英语