1. At this, the police pointed out ironically that this would hardly be necessary as the men were already under arrest.
    警察听了这句话，讽刺地指出，这大可不必，因为这两名工人已被拘留了。

2. At this, the police pointed out ironically that this would hardly be necessary as the men were already under arrest.
    警察听后讥讽地说，这大可不必，因为他俩已被逮捕了。

3. Ironically, Europe, which had bequeathed the rabbit as a pest to Australia, acquired this man-made disease as a pestilence.
    具有讽刺意味的是，欧洲把这种兔子作为有害动物传给澳洲，而欧洲自己却染上了这种人为的瘟疫般的疾病。