mercilessly

例句：

1. 1. The criminal was caught by the police with no mercy.
   这个罪犯被警察毫不留情地抓获了。
2. 2.The teacher punished the student without mercy, causing him to cry all night.
   老师对那个学生毫不留情地惩罚，让他一整夜都在哭。
3. 3. The hunter killed the deer without mercy, leaving it to die slowly.
   猎人毫不留情地杀死了那只鹿，让它慢慢地死去。