递降的

例句：

1. 1. The population of the city is declining due to aging populations.
   由于老龄化人口，该城市的人口正在下降。
2. 2. The economy of the country is diminishing as it faces numerous challenges.
   该国经济正逐渐减弱，面临众多挑战。
3. 3. The temperature is declining rapidly in this region.
   该地区的温度正在迅速下降。