a remorseless killer的用法和样例：
- Within the hardened carapace beats the heart of a remorseless killer.
- Dengar was patched together by agents of the Empire and transformed into a remorseless killer.
- She emerged from her training a deadly, remorseless killer, seeking revenge for all who had wronged her in the past.
- Miserable little propitiators of a remorseless Idol, how abject we were to him!