apparent distance

• 外现距离,视距,表观距离

apparent distance的用法和样例：

例句

1. Notice the difference in the apparent distance of objects that each focal length produces.
   注意每种焦距所产生的物体视距的差异。
2. When reading the book, we should keep at least a 25cm distance from the book in order to protect our eyes.
   看书的时候，为了眼睛健康，请保持正确的明视距离！