回答
2022-12-03 23:58:21
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This is not a piece of advice to you I'm talking to myself for my practice of writing skills.
'their equal in terror' this part is grammatically strange. I suppose this part might be they're equal in terror, so equal may be adjective.
After Jack the Ripper and before Son of Sam there is only one name they're equal in terror: the deadly, elusive, and mysterious Zodiac.