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1.But a group of French scientists have made a self-healing rubber band material that can reclaim its stretchy usefulness by simply pressing the broken edges back together for a few minutes.
不过，法国一组科研人员日前研制出一种可以“自我愈合”的橡皮筋材料，用这种材料制成的橡皮筋断了之后，只需将断裂两端按住几分钟，就能恢复得完好如初。收藏指正
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