今天我来到学校，摇了摇我的那颗快要掉了的下门牙，就去整理书包了。忽然，我感觉我的舌头上有一个东西，拿出来一看，啊，原来是一颗牙！我高兴坏了，赶紧把它放进我的铅笔盒子里。我仔细地打量着这颗牙，它跟我前些天用舌头感觉到的的完全不一样，它不是弯弯的、白白的，而是有一点点黄，还直挺挺的，还那么小，象一颗破损的米粒。
Today, I came to school, shook my lower front tooth, and went to pack it. Suddenly, I felt that there was something on my tongue. I took it out and saw that it was a tooth! I'm so happy that I put it in my pencil box. I looked at the tooth carefully. It was totally different from what I felt with my tongue the other day. It was not curved and white, but a little yellow, straight and small, like a broken rice grain.
这颗牙掉落时虽然很痛，但是我却很开心，因为缺口处已经长出了一颗新的小牙。
Although the tooth was painful when it fell, I was very happy because a new tooth had grown in the gap.
这是个值得纪念的日子，我打算好好珍藏这颗牙齿。
It's a memorable day. I'm going to treasure this tooth.