单语范例（未经PONS编辑处理）
As the tooth actively erupts, the coronal part of the fused and surrounding epithelium peels back off the crown.
en.wikipedia.org They were first observed in the two 1970 rocket flights which also detected "coronal holes".
en.wikipedia.org A "tsunami wave" occurs when the sun emits a coronal mass ejection, throwing out a magnetic cloud of plasma from its surface.
phys.org The unconnected magnetic helical field and the material that it contains may violently expand outwards forming a coronal mass ejection.
en.wikipedia.org The comet was hit by a coronal mass ejection during its pass near the sun; some rumoured it had disturbed the sun, but scientists dismissed this notion.
en.wikipedia.org