And in the iPhone 4, a new gyroscope allows for additional motion-sensing capabilities, too, like the ability to track orientation, velocity and rotation.
iPhone 4的陀螺仪则支持更多动作感知功能，比如跟踪方向、速度和旋转等。
2
We define average velocity as the position at time four seconds minus the position at time zero, 4 divided by four.
我们定义平均速度，是四秒时的位置，减去0秒时的位置，除以。
3
The sciatic nerve function index(SFI), the motor nerve conduction velocity(MNCV) and total myelinated axons per sight were counted on 2 and 4 weeks after the surgery.