他把这件事放在心底。
He keeps this matter in his heart.
bottom of one's heart
Every character draws itself, stroke by stroke. Then grab the brush: trace it yourself and hear the word when you finish.
Nice writing!
Chinese words snap together like bricks. Every word below shares a character with this one, so you are already halfway to knowing it.
他把这件事放在心底。
He keeps this matter in his heart.
她心底很高兴。
Deep down, she is very happy.