单词:brittle fracture of polymers
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Idiom: Not have the heart to do sth 不忍心做什么 Hit the book: Shatter Brittle Forensics Rivet Residue Smelting Fracture Prone Substandard Bow Stern
坚持不懈,直到成功。 我们每天的奋斗就像对参天大树的一次砍击,头几刀可能了无痕迹。每一击看似微不足道,然而,累积起来,巨树终会倒下。这恰
This is Scientific Americans 60-Second Science. Im Steve Mirsky. Got a minute? Ever been woken up by the sound of the refrigerator compressor kicking on? Well, such clumsy heat exchange units featuring long metal coils may be on their way out. Becaus
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By Carol Pearson Washington 28 November 2007 Every year, more than one and a half million people worldwide fall and fracture a hip. Of that number, about 80 percent are women. These fractures are painful and associated with a high death rate. VOA's C
最近有科学家正在研发一种全新的电子纸技术,这种电子纸其实就是一种超薄的柔性显示屏,具有很高的能效性,并且在阳光直射或明亮环境中也可以清晰地显示出内容。这种柔性显示屏的厚