其余参与调查的人则报告说，他们睡觉的姿势不稳定，或不知道。

The remainder of those in the poll said the position they fell asleep varied or did not know.

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罗萨莱斯博士提到帕金森病有两大类型，一类以震颤为主要特征(TD - PD)，另一类则表现为姿势不稳、步履艰难(PIGD)。

Dr Rosales mentions two major sub-types of PD. These are the tremor dominant form (TD-PD) and PD with postural instability and gait difficulty (PIGD.)

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当在滑溜的路面过弯且速度更快时，踏板水平的姿势会显得不稳并且轮胎可能会侧滑出去。

At higher speeds on slippery surfaces with no burn, keeping your pedals parallel would be unstable and your tires will want to slide-out.

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