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.
另一個在M系列機型的特點是方便鋸齒狀擋板圈，這是很容易把在寒冷的條件下，甚至戴著手套。

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)