Diet plays an important role in the management of heart disease.

饮食对于心脏病的治疗有重要作用。

Money plays an important role in the material world.

金钱在物欲横流的世界中扮演重要角色。

As is known to all, using clean energy plays an important role in pollution reduction.

众所周知，使用清洁能源在减少污染方面发挥着重要作用。

These tiny things form the base of the food chain and play an important role in the global carbon cycle.

这些微小的东西构成了食物链的基础，并在全球碳循环中发挥着重要作用。

While we may not recall our nocturnal visions, scientists increasingly believe our dreams play an important role in memory and learning.

尽管我们回想不起夜间梦景，科学家日益相信，我们的梦在记忆和学习中起重要作用。