This is a **metal long pendant necklace engraved with physical formulas**, continuing the "science romance" style with richer details:

### Design and symbols
- **Formula content**: Each long strip is engraved with **classic physical formulas** (such as relativity, quantum mechanics equations), turning abstract scientific theories into concrete accessories, which is a representative of "knowledge-based dressing";
- **Material craftsmanship**: Metal (most likely titanium steel/stainless steel) material, silver matte texture, snake bone chain + long pendant combination, industrial style, full of technological sense;
- **Emotional value**: For physics enthusiasts and science students, it is "wearing passion on the body", which can reflect unique taste whether it is given as a or used for personal use, and focuses on "hardcore romance".

### Outfit and scene
- **Daily outfit**: Paired with simple black and gray outfits (sweatshirts, jeans, suits), it instantly adds a "scholar atmosphere", low-key and memorable;
- **Special occasions**: Academic exchanges, science-themed gatherings, wearing it directly becomes a "professional concentration" existence, and easily integrates into the circle of like-minded people;
- **The first choice for s**: Give it to friends and students of physics/science and engineering, and use formulas to convey resonance, which is more touching than ordinary accessories. It is a surprise that "those who understand will understand".

Simply put, it is to wear the physics formula into a trendy "science student necklace", which is hardcore and romantic. When science people wear it, it means that the "outfit + love" buff is fully stacked. Walking on the street, people who understand the formula will understand your specialness at a glance~