用retractile造句子，“retractile”造句

1、cats have retractile claws.

4、Any of numerous aquatic or terrestrial mollusks of the class Gastropoda, typically having a spirally coiled shell, broad retractile foot, and distinct head.

3、The lens is made of cell-shaped plastic which has the beautiful retractile effect.

5、According to the position and slippage of these testes,undescended testis was classified as: cryptorchidism (187),gliding testis (67),testis of high scrotal position (15),retractile testis (15) and ectopic testis (11).

2、It also states a troubleshooting analysis of the undercarriages retractile system.