医生检查了病人的冠状缝以评估头部损伤情况。

The doctor examined the patient's ___coronal suture to assess head injuries.

太阳的日冕层在日食期间清晰可见。

The sun's ___coronal layer becomes clearly visible during a solar eclipse.

在语音学中，'s'和'z'这样的音被归类为舌冠音。

Sounds like 's' and 'z' are considered ___coronal sounds in phonetics.