flicker|flickered|flickering|flickers

蜡烛的火焰在闪烁。

The candle's flame is ___flickering.

蜡烛的火焰跳动着。

The flame of the candle ___flickers.

昏暗的灯泡在暴风雨中忽明忽暗。

The dim bulb ___flickered during the storm.