更多pterygium例句

1. Pterygium should be removed when advancing across the cornea, especially when the pupillary area is becoming involved.
2. Each consists of a basal portion, the basi-pterygium, and of a number of dermal rays.
3. There is always a large basi-pterygium which lies imbedded in the muscles and meets its fellow at its proximal end.
4. In Chimaera all three basalia are present, but the meso-pterygium is shifted and does not articulate with the pectoral girdle.
5. The males in Elasmobranchii and Holocephali have the distal end of the meta-pterygium prolonged into a clasper.