他的热情减退了。
His enthusiasm has waned.
to ebb; to go down; to decline
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.
他的热情减退了。
His enthusiasm has waned.
视力随年龄减退。
Eyesight declines with age.