求翻译：大家好，我是某中学的学生建华，我在生活中看到很多不好的现象，现在这里反映一下，在班级里同学们乱扔垃圾，垃圾桶就在前面但他们依然随便扔在地上，有的老师时乱扔粉笔头，也不太注意卫生，所以我建议大家保护环境卫生，保护环境从我做起是什么意思？

Hi, I am a middle school student Jian Hua, I see a lot of bad behavior in my life, now here reflect what students in the class litter, rubbish bins in front but they are still casually thrown on the ground, some teachers throw chalk at head, less attention to health, so I suggest protecting environmental health, protect the environment from my start