求翻译：故障现象：车辆行驶时，明显感到传动系周期性的强烈振动传到车身上，而且加速与滑行有明显不同，当车辆停驶，发动机在各种转速下运转此振动均消失。是什么意思？

Fault phenomenon: when the vehicle, clearly felt that the periodic strong vibration of the drive train reached the body of the vehicle, and accelerate and glide are significantly different, the engine operating in a variety of speed when the vehicle is suspended, this vibration disappeared.

Symptom: When the vehicle is in motion, it was apparent the periodic transmission of vibrations to the body, but also accelerate and scooter there is a clear difference, when the vehicle stopped the vehicle, the engine running in a variety of speed this vibration are gone.

Trouble phenomenon: while driving, clearly felt that Powertrain periodic strong vibration to the car body, and acceleration and glide have significantly different when the vehicle stopped, engine running under a variety of speed this vibration disappears.