日食期间，我们可以看到太阳周围有一圈明亮的光晕，那就是日冕。

During a solar eclipse, we can see a bright halo around the sun, which is the ___corona.

牙医说我的磨牙冠部有轻微的裂纹。

The dentist found a small crack on the ___corona of my molar.

疫情期间，我们都需要戴口罩来防止感染。

We all need to wear masks to protect ourselves from ___corona.

教堂中央悬挂着一盏华丽的青铜花冠吊灯。

A magnificent bronze ___corona hangs in the center of the church.