```json
{
"prompt": "A detailed illustration of a tree trunk cross-section, showcasing the heartwood at the center. The heartwood is depicted in a darker shade, surrounded by a lighter-colored sapwood. The tree rings are clearly visible, radiating outwards from the heartwood. The background is a natural forest setting with lush greenery and sunlight filtering through the trees. The style is realistic and detailed, with a focus on the textures and colors of the wood. Ensure no text is included in the image to avoid any potential errors.",
"explanation": "這幅插圖展示了樹幹的橫切面，中央部分是顏色較深的心材，外圍是較淺色的邊材。樹木的年輪清晰可見，從心材向外輻射。背景是茂密的森林景觀，陽光透過樹葉斑駁地照射下來。這樣的設計不僅能夠吸引學生和學華語的人士，也能有效地傳達“心材”這一詞語的具體含義和自然美感。",
"alt": "樹幹橫切面展示心材的插圖",
"title": "樹幹橫切面展示心材的場景，中央部分是顏色較深的心材，外圍是較淺色的邊材。樹木的年輪清晰可見，從心材向外輻射。這幅圖片有效地傳達“心材”這一詞語的具體含義和自然美感。"
}
```
