如果不及时修理，这栋老房子的状况会进一步恶化。

The condition of this old house will ___deteriorate further if not repaired in time.

长时间暴露在潮湿环境中，木材的质量会逐渐变差。

The quality of wood ___deteriorates when exposed to moisture for long periods.

如果不好好维护，这台机器的性能会逐渐下降。

If not properly maintained, the machine's performance ___deteriorates over time.