An eyepiece with wide apparentfield (in degrees) and lower powers used on a telescope allow wider fields of view.
较宽的目镜视场搭配较低的放大率可以得到更宽的视场角。
2
As you are defining the elements of the sketch with the user, it becomes apparent that a Document artifact is necessary to define the validation rules for a particular field.
在您和该用户定义元素草图时，就会意识到，需要使用Document工件来为特定的字段定义验证规则。
3
"Another challenge facing clinicians is the fact that apparent visual field progression often is not confirmed on repeat visual field testing," he said.