不同灯泡的亮度可以通过旋钮调节。

The ___brightness of different bulbs can be adjusted with a knob.

他的机智在辩论中总是让人印象深刻。

His ___brightness always stands out during debates.

她性格中的活泼开朗让整个房间都明亮起来。

The ___brightness in her character lit up the whole room.