女汗子的眼泪是钻石
[nǚ hàn zi de yăn lèi shì zuàn shí]
It means 'a female runner's tears are diamonds,' suggesting that a woman, no matter how much she struggles, perseveres through difficulties. The implication being the sweat (tears here metaphorically) and hardship are as precious and hard-earned as diamonds, reflecting on inner strength or pride.