vision signal characteristic

例句：

1. 1.He has a good vision of the future.
   他对未来有很好的预见。
2. 2. She had to adjust her glasses to see clearly.
   她不得不调整眼镜才能看得清楚。
3. 3.The scientist's vision is focused on developing new technologies.
   这位科学家的愿景是开发新技术。