人数增长在英语中可以表达为"population growth"或"number growth"，具体使用取决于上下文。以下是一篇使用这两个表达的示例文章：

In recent years, the population growth in urban areas has been a significant topic of discussion. As cities continue to attract more residents due to job opportunities and improved living conditions, the need for sustainable urban planning becomes increasingly urgent. Population growth not only affects the infrastructure but also influences the social and economic dynamics of a city.

For instance, in metropolitan areas like New York and London, the number growth has led to increased demand for housing, transportation, and public services. To address these challenges, local governments have implemented various strategies such as expanding public transportation networks, promoting green spaces, and encouraging mixed-use developments.

Moreover, population growth can have both positive and negative impacts on a community. On one hand, it can stimulate economic activities and cultural diversity. On the other hand, it can also lead to overcrowding and strain on resources if not managed properly.

In conclusion, understanding and managing population growth is crucial for ensuring the well-being of urban communities. By adopting proactive measures and fostering collaboration among stakeholders, cities can harness the benefits of population growth while mitigating its potential drawbacks.