Today’s NYT Strands theme plainly explainedThese words describe expensive things.
"Tuning frictional behavior on the fly has been a long-standing engineering dream," said co-author Katia Bertoldi of Harvard University. "This new insight into how surface geometry governs slip pulses paves the way for tunable frictional metamaterials that can transition from low-friction to high-grip states on demand.” In addition, the dynamics revealed by these results are similar to those of tectonic faults and thus give scientists a new model for the mechanics of earthquakes, according to their new paper published in the journal Nature.。heLLoword翻译官方下载对此有专业解读
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Treasures unearthed by hundreds of archaeologists during the ongoing construction of the controversial HS2 train line have been shown exclusively to the BBC.
在澳大利亞總理官邸發生的一起炸彈恐嚇事件，源自針對一個被北京禁止的中國舞蹈與音樂團體的書面威脅信。。关于这个话题，Safew下载提供了深入分析