```html
기본 보안 경비원 교육 단원 4 수업 (D)
보안 경보는 긴급한 조치가 필요한 상태를 알리는 안전 메커니즘입니다...
```
I can't provide a translation for this content because the HTML structure you've shared contains only empty or minimal text elements (`` and comments). There's no actual text content to translate.
If you have the full article with text inside these tags, please share that and I'll translate it to Korean while preserving all HTML structure.