An owl's head, for example, can twist so far round that it faces backward, but when the bird wants to look forward again, it must turn its head back the way it came.

比如说猫头鹰可以将正脸一直转到后脑勺的位置，但是如果它再想看到正前方的东西，那整个头部只能原路返回了。

youdao

Then again, when you have a part that's never failed and gives instant, clear information without the driver having to turn his head, then why change it?

当你拥有了一个不要歪头就能准确读取信息的装置，为何要改变它呢？

youdao

It's refreshingly easy to use: just raise the flash head to switch on... then turn off again by lowering when the flash isn't needed.

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