Nodding frequency is obtained by trackinghead movements.
点头频率特征是通过跟踪头部运动获得的。
2
And with headtracking available, placement options are increased: the UI can be placed to the user's side, or above the normal line of sight, for instance.
由于具有头部跟踪可用，需要增加放置选项：比如，UI可以放置到用户的一侧，或在正常视线之上。
3
The cutting head equips with automatic tracking system, focusing automatically, responding quickly and accurately.