这些科技巨头是全球创新的主要推动力。

These tech giants are the major ___powerhouses of global innovation.

这支篮球队多年来一直是联赛中的强队。

This basketball team has been a ___powerhouse in the league for many years.

这座核电站是整个城市的能源核心。

The nuclear plant is the main ___powerhouse for the entire city.