Helen: If you check, you'll find a small metal plate on the floor inside your booth.
海伦：如果你找一下，就会在摊位的地板上找到一个小金属圆盘。
A small metal plate is typically affixed to the front of the upper and lower vertebrae to provide stability while the bone fusion heals together, a process that can take up to 18 months.
通常，需要使用一块小的金属板贴附于上下两个椎板之间，这样在骨愈合过程中，可以提高稳定性。完全骨愈合大约需要要18个月。
In initial testing, the amount of power produced was vanishingly small — just 15 picowatts, or trillionths of a watt, per square centimeter of metal plate.
在初始测试阶段，能够获得的电能是极其微小的——每平方厘米的金属片只有15皮瓦(百亿分之一瓦)。
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