站在雨中无人知道那是泪
[zhàn zài yŭ zhōng wú rén zhī dào nèi shì lèi]
'Standing in the rain, no one knows those are tears.' This phrase depicts an image of a person standing in the rain where their sadness is hidden among the droplets falling down their face—it's hard for others to tell whether the water is from raindrops or tears, conveying sorrow or emotional distress endured privately.