例句
From one perspective, the development of a very small penis could be considered the next step in male hominid evolution.
从这一角度看，在原始男性进化中，非常小阴茎的男人在下一步可能优先考虑发展。
So the ejaculation of semen goes backwards, up the penis and into the bladder.
所以射精时精液是逆向的，顺着阴茎向上到了膀胱里。