例句與造句

1. It is narrow, and of uniform size in the body of the penis, measuring about 6 mm in diameter; it is dilated behind, within the bulb, and again anteriorly within the glans penis, where it forms the fossa navicularis urethrae.
2. It's difficult to find fossa navicularis urethrae in a sentence. 用fossa navicularis urethrae造句挺難的