entrance window的用法和样例：
例句
- The physical stop which corresponds to the entrance window is then the required field stop.
入射窗所对应的实物光阑就是所要求的场光阑。 - Clouds return radiant energy to the surface primarily via the atmospheric window.
云主要通过大气窗区向地表辐射能量。 - The wind from the small opening on the wall was whirring, while from time to time snowflakes flew in to congeal in pearly drops against the window.
风车哗啦哗啦地响在壁上，通气窗时时有小的雪片飞进来，在窗台上结着些水珠。
