“嗨,老单!”我从复杂的化学公式中抬起头来,扭了扭脖子,才注意到刚刚那个声音的来源——眼前这个姑娘。大概是曾经印象很深刻吧,即便是在高三这昏天黑地的日子里,我还是能清晰地回忆起眼前这个姑娘的种种。但是瞬间,我便意识到眼前的这个人,已经不是初三时候的那个伶俐姑娘了。记忆里笑容暖暖的她,此刻戴着银光闪闪的牙套看着我,笑的很吃力;大大小小的青春痘在额头上稀稀拉拉地扩散开来;刘海有些打绺,凌乱地粘 “Hey, the old one!” I looked up from the complex chemical formula and twisted my neck to notice the source of the sound - the girl in front of me. I was impressed. Even in the days when I was in her third year of high school, I can clearly recall the girl who is in front of me. But in an instant, I realized that this person in front of me was not the clever girl at the beginning of the third. Memory of her warm smile, wearing a shiny braces at the moment looked at me, very laughed hard; large and small acne in the forehead sparsely spread; bang bang, messy sticky