人前で弱さをみせず、本当は泣きたいのに無理に笑おうとしてしまう。
でも一人のときは泣きたいだけ泣いて、立ち直るための涙だから。

Shed tears
You don’t show weakness in public, you force yourself to laugh when you really want to cry. But when you are alone, you cry as much as you want to, because it is the tears that help you get back on your feet.