Sometimes I will lose the context of my speech in an instant, as if a sudden gust of wind blows away the music score being played without leaving a trace.
Mandarin
他消失得无影无踪。
他消失得無影無蹤。
tā xiāo shī dé wú yǐng wú zōng 。
He's disappeared without a trace.
Examples (粵典–words.hk)
Cantonese
无影无踪
無影無蹤
mou4 jing2 mou4 zung1
to vanish into thin air
missing
Cantonese
凶徒行凶后逃去无踪。
兇徒行兇後逃去無蹤。
The perpetrator escaped after committing the murder.