1.The modifications can be done with a combination of the Edge Enhance effect and pixel-level editing of the state borders.
可以结合EdgeEnhance效果和州界的像素级别的编辑来完成修改。
2.The study is helpful for students to have a comprehensive knowledge, to improve the skills, and to enhance effect in study.
研究两者之间的关系，有助于学生在学习中融会贯通、互为促进、提高技能、增强学习效果。