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Practice Listening: Highlight Incorrect Words
ID: #50986
Short
Button Cell
* Click on the words that are different from what you hear
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Correct Transcript:
They're called button cells, coin cells or watch batteries. By any name, these tiny, round batteries pose a choking danger to small kids. And if a child succeeds in swallowing a button cell, the battery may short-circuit in the moist esphageal environment, burning the tissue. A few thousand kids wind up in emergency rooms each year after swallowing a button battery. But a team of Harvard and M.I.T. researchers that includes prolific inventor Robert Langer thinks they have a partial solution: a protective coating. The scientists covered batteries with a material—technically a quantum-tunneling composite—in which microparticles of conductive metal are suspended in an insulating layer. Under most circumstances, including inside of a child, the layer is nonconductive.
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