Delete row 264 from pager_reading_material_paragraphs

id 264
material_id mat_4e7c6d11
paragraph_index 5
paragraph_text 部队到达陕北的时候，那口铜锅担在了我的肩上。连长看见了，低下了头，战士们流出了眼泪。
create_time 2026-06-16 13:59:33
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