年轻人的家人警告他要当心凶猛的野兽。

The young man's family warned him of fierce beasts.

youdao

虎豹都是凶猛的野兽。

The oncoming force of the typhoon was ferocious.

youdao

那母狮子原是只凶猛的野兽，今天牠却这般温顺。

As docile as she seems today, that lioness was once a ferocious beast.

youdao

The simile is there ostensibly to compare Satan with the great sea beast, leviathan. In the comparison of Satan's shield with the moon is the figure of the Tuscan artist, the Tuscan artist being Galileo.

这个明喻很明显是将撒旦和凶猛的海中野兽利维坦，进行了对比，在把撒旦的庇护和月亮的比较之中,突出了那个托斯卡纳艺术家的形象，伽利略。

耶鲁公开课 - 弥尔顿课程节选