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Translating step 4

Step 4
We turn our attention to the back of the case, where we find a composite cover  with hard-coated, optical polymer lenses protecting a set of LEDs and photodiodes. The specially designed heart rate sensor uses a combination of infrared and visible-light sensors to gauge your heart rate.
  • We turn our attention to the back of the case, where we find a composite cover with hard-coated, optical polymer lenses protecting a set of LEDs and photodiodes.

  • The specially designed heart rate sensor uses a combination of infrared and visible-light sensors to gauge your heart rate.

  • Unlike the Apple Watch Sport, the back cases of the Apple Watch and the Apple Watch Edition feature a Zirconia ceramic cover with sapphire lenses.

  • Opposite the Digital Crown, we find the microphone and speaker ports.

我们来到手表背面,背面有一组LED和感光二极管,外壳为硬质涂层的光合聚合物透镜

特别设计的心率传感器使用红外线和可见光传感器协同工作来测量心率。

和Apple Watch Sport版不同的是,Apple Watch和Apple Watch Edition的背面用的是蓝宝石镜片的氧化锆陶瓷外壳。

在装有数码表冠的另一端,我们看到了麦克风和扬声器端口。

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