There is, however, at least one known example of perfect, lifelong fidelity, and its name is Diplozoon paradoxum.

不过 至少还有一个赤胆忠心的例子当两只年轻的吸虫相遇时。

The most romantic creature might be the diplozoon paradoxum.

最浪漫的生物可能是 diplozoon paradoxum。