There's lighting inside the case and sight window on the outside door, convenient for observation.

两个玻璃观察窗位于给料机进口端（端门），用于观察胶带运行状况。

youdao

She started a little at the sight of the open window.

她看到开着的窗户，吓了一跳。

youdao

But as we look out our window, we suddenly see the last coach of the other train disappear from sight and notice the motionless station behind it.

但当我们往窗外一看，这才突然看见另一列火车的最后一节车厢从我们的视野中正在消失，于是我们看到那一列火车后面留下的是不动的火车站。

youdao

Nor were they likely to in the near future, given the task ahead, and the sight from our window of the thousands of pilgrims milling around the white marble of the Grand Mosque.

CNN: Preparing to cover The Hajj

Joel lay mute and still in his bath, then shivered in his Spider-Man pajamas and refused to get into bed because he had caught sight of the moon through his bedroom window.

NEWYORKER: The Swan