optically

基本解释

If you like to photograph birds or touchdown passes, look for a long zoom that can extend optically to 200mm or even 400mm.
如果更喜欢拍摄远处的小鸟或者山脉，那么你应该选择一款光学变焦达200mm或400mm的相机。
If you have glasses you know that optically focus has to do with bringing the light to a focal point in the back of your eye.
如果您戴眼镜，您就会知道，从光学的层面理解，焦点的意思是，将光线汇聚到您眼底的一点上。
In this environment “daylight readability” based on U.S. Navy MIL-HDBK-87213 Revision A Electronically/Optically Generated Airborne Displays is more appropriate.
在这种环境下，基于美海军MIL-HDBK-87213A版机载光电显示器军标，实现阳光直射下清晰可见是最恰当的，因为它为开发飞行显示器、任务航空电子控制器和飞机的显示子系统提供了规范和指南。
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