5秒倒计时 (每秒报数,带负数5秒)
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原音频素材BV1RC4y1V7TD
5 - "三铝四硅五氮磷"[4]
4 - "三铝四硅五氮磷"[2]
3 - "三铝四硅五氮磷"[0]
2 - "铜一二铁二三"[-2]
1 - "铜一二铁二三"[1]
0 - "三铝四硅五氮磷"[-1]
- - "氢氧负一铵正一"[2]
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