to cause something to remain in its original state without any significant change
保持
beyond the appropriate or necessary amount, often to a point that is undesirable or harmful
太多
a permanent change in global or regional climate patterns, including temperature, wind, and rainfall
气候变化
the condition of lacking enough money or income to afford basic needs like food, clothing, etc.
贫穷
the process of people moving from rural areas to urban areas, resulting in the growth of cities and the expansion of urban areas
城市化
the rapid spread of an infectious disease within a specific population, community, or region, affecting a significant number of individuals at the same time
流行病
to clean something by using water to make the dirt or other substances go away
冲洗掉
the act or process of making a substance or place dirty or polluted, especially by dangerous substances
污染
used to show that something happened or is true, even though there was a difficulty or obstacle that might have prevented it
尽管