When my printer's type began to grow faint, I called a local repair shop, where a friendly man informed me that the printer probably needed only to be cleaned.
我的打印机打出来的字开始模糊不清了，于是，我给当地的一家修理店打了一个电话，那里的一位友善的男士告诉我：打印机很可能只要清洗一下就好了。
Since white dwarves have no fuel left for fusion, they grow cooler and cooler over billions of years to become black dwarves too faint to detect.
随着白矮星变得没有剩余的燃料用于聚变，它们会在之后的几十亿年中越来越冷，而成为难以被探测到的黑矮星。
Since white dwarves have no fuel left for fusion, they grow cooler and cooler over billions of years to become black dwarves too faint to detect.
随着白矮星变得没有剩余的燃料用于聚变，它们会在之后的几十亿年中越来越冷，而成为难以被探测到的黑矮星。
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