The Mersenne prime is an important research topic number theory.

梅森素数分布研究是数学中的一大难题.

Application-layer multicast is an important research topic for the Internet.

应用层多播是互联网研究的一个重要课题。

With the rapid development of subway, the fire and smoke prevention become an important research topic.

随着地铁在我国的高速发展, 在地铁中防火防烟已经成为一个重要的研究内容.

Plastic film mulching cultivation has become an important research topic in China in the past few years.

水稻地膜覆盖栽培近几年正在中国兴起。

In transaction database mining, predicting the future behavior of patterns has become an important research topic.

在交易数据库的挖掘研究中，模式未来行为的预测已成为用户关注的焦点。

Understanding how to use multimedia to promote the effect of learning is an important research topic for contemporary educational psychology and cognitive psychology.

在教学过程中如何利用多媒体来促进学习者的学习，这是当代教育心理学和认知心理学的研究热点之一。

Therefore, developing evapotranspiration models of vegetation is always an important research topic in both ecological process and water resources management of terrestrial ecosystem.

因此，植被蒸发散量的估算模型开发一直是陆地生态系统的生态学过程和水资源管理研究的重要领域。