... The Discovery of the X．ray X射线的发现 The Invention of Stethoscope 听诊器的发明 The Discovery of America 发现美洲 ...
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如今，在听诊器发明190年后，这种挂在医生脖子上可现场诊断的工具终于有了现代版。
Now, 190 years after its invention, the go-to diagnostic tool hanging around every doc's neck has earned a modern makeover.
1819年发明听诊器后，改善并扩大了这种诊断方法，现在即使其它的诊断技术日新月异，听诊还是一种非常有用的诊断方式。
The invention of the stethoscope in 1819 improved and expanded this practice, still very useful despite the great technological advances in other means of diagnosis.
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