竞争对手试图通过散布谣言来败坏他的名声。

The rival tried to ___blacken his reputation by spreading rumors.

长时间暴露在阳光下会使照片发黑。

Prolonged exposure to sunlight will ___blacken the photograph.

媒体试图通过散布谣言来抹黑这位演员的形象。

The media tried to ___blacken the actor's image by spreading false rumors.