◁think▷I need to write a 50–80 word English description of the composite LF-NMR image of apple #20, focusing on internal moisture distribution, tissue structure, signal intensity, and patch morphology. I should avoid using certain prohibited words like 'healthy', 'diseased', 'mild', 'severe', 'normal', 'abnormal', 'ground-truth', or 'label'.

Let me analyze the image:
- The image shows cross-sectional slices of an apple
- There appear to be multiple slices arranged in a grid
- The slices show variations in grayscale intensity
- Some areas appear darker (lower signal intensity) and some lighter (higher signal intensity)
- There seem to be some patches or areas with different morphologies

For the description, I'll focus on:
1. Internal moisture distribution: How water content varies within the apple tissue
2. Tissue structure: The arrangement and density of cellular structures
3. Signal intensity: How different regions appear in the LF-NMR imaging
4. Patch morphology: Characteristics of distinct areas or patches in the image

I'll craft a concise description without using prohibited terms, focusing on objective observations.◁/think▷The composite LF-NMR image of apple #20 reveals distinct variations in internal moisture distribution across tissue sections. Signal intensity differences suggest heterogeneous water content, with darker regions indicating lower moisture levels and brighter areas corresponding to higher moisture concentrations. Tissue structures display irregular morphologies, featuring both dense and porous cellular arrangements. Notable patchy regions exhibit contrasting signal intensities, suggesting localized moisture retention patterns. The imaging highlights structural heterogeneity throughout the apple, with signal variations correlating spatially to moisture distribution zones.