摄影师正在微调相机的设置以获得最佳效果。

The photographer is ___tweaking the camera settings for the best result.

他顽皮地捏了捏妹妹的脸颊逗她笑。

He playfully ___tweaked his sister's cheek to make her laugh.

警察在公园里抓到他吸毒。

The police caught him ___tweaking in the park.