1. It further states that these compounds are useful in the treatment of erectile dysfunction, and that one of the preferred compounds induces erections in impotent men.
2. erections
2. They also experienced improvement in several measures of sexual function, including the quality of their erections.
3. erections
3. In one test, men would be observed while sleeping to see if erections occurred.
4. erections的意思
4. That could be related to nocturnal erections, which men normally have every night.