1·I am a bit unaccustomed to it.
我还真觉得有点儿不习惯。
2·I am unaccustomed to public show.
我不习惯抛头露面。
3·Skeletal muscle damage can result from disease and unaccustomed or excessive exercise.
疾病和不习惯或过度运动可能会导致骨骼肌损伤。