ELF extremely low frequency 极低频
ELF F extremely low frequency 极低频
low elf
低的精灵
以上为机器翻译结果，长、整句建议使用 人工翻译 。
It embarrasses me to hear people talk this way I think I'll be a low-key sort of elf.
NPR: Crumpet the Elf Reads from Santaland Diaries
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