铅笔是小学生最常用的学习工具之一,初学写铅笔字时,除了要掌握正确的握笔姿势和书写姿势外,还应当注意养成良好的卫生习惯,决不要养成咬铅笔的习惯。目前,我国学生用的铅笔大都用彩色漆料作涂层。如果小学生有咬铅笔的习惯,那么涂漆层中所含的铅就会有一部分进入人体血液中,久而久之,随着可溶性铅进入血液的含量逐步增加,就有可能造成慢性铅中毒。 Pencil is one of the most commonly used learning tools for primary school children. When learning how to write a pencil, you should pay attention to cultivating good hygiene habits and never getting into the habit of biting pencils. At present, most of the pencils used by our students are painted with colored paints. If the pupils have the habit of biting a pencil, then some of the lead contained in the paint layer will enter the bloodstream of the human body. Over time, as the content of soluble lead into the blood gradually increases, it is possible to cause chronic lead poisoning.