1. at the edge of在……的边缘 【读一读 ➡ 品味语境】 ※A pine tree stands at the edge of the steep cliff. 陡峭悬崖的边缘有一棵松树。 ※The student got rid of those letters at the edge of the page. 那个学生把那页边上的字母去掉了。 ※The factory is situated on the edge of the town. 这座工厂坐落在该城镇的边上。 ※ Many rare animals are on the edge of dying out. 许多稀有动物濒临灭绝。