bezel ring

基本解释

Another convenient feature of the models in the M series is the serrated bezel ring, which is easy to turn even in cold conditions while wearing gloves.
另一个在M系列机型的特点是方便锯齿状挡板圈，这是很容易把在寒冷的条件下，甚至戴着手套。

We discussed the extremely narrow display bezel, striking RGB notification ring around the home button, recessed camera lens and IR blaster (for the QRemote functionality).
ENGADGET
Of course, while this aligns with specs we heard about earlier, this device looks to be very much a prototype (where's the silver ring around the bezel) so don't take this as the final word on the matter, ok?
ENGADGET: Samsung Galaxy Tab P1000 gets wild with Android 2.2
An outward-facing ring of the same infrared sensors would be embedded into your smartphone's bezel, and we tried a version attached to a chunky metal bar that played different sound effects when you tapped your fingers in front of it.
ENGADGET: Neonode's Proximity multi-sensing technology hands-on (video)