去年我生日那天，回家的時候發(fā)現(xiàn)門牙不見了。

On my birthday last year, when I went home, I found my front teeth missing.

一年快要過去了，門牙還沒有長出來。媽媽總以為我是缺鈣。于是，給我補了許多鈣?？墒情T牙還是沒有長出來?，F(xiàn)在，我參加了學(xué)校的籃球班，打完籃球后，我突然發(fā)現(xiàn)門牙一點一點地長出來了。

A year is almost over, and the front teeth haven't grown yet. Mom always thought I was short of calcium. So I got a lot of calcium. But the front teeth didn't grow. Now, I took part in the school basketball class. After playing basketball, I suddenly found that the front teeth grew up little by little.

原來，是我沒有運動才不長牙。看來，我以后要多多運動。

It turns out that I don't have teeth without exercise. It seems that I will exercise more in the future.