如果长时间不锻炼，人的身体状况会逐渐恶化。

If you don't exercise regularly, your physical condition ___degenerates over time.

那个赌徒整天沉迷于赌博，已经变成了一个堕落的人。

The gambler, addicted to betting all day, has become a ___degenerate.

会议很快演变成了无意义的争吵。

The meeting quickly ___degenerated into meaningless arguments.