Delete row 54 from textbook_units

id 54
version_id yuwen_bubian_4x
unit_order 2
title 第二单元：琥珀·飞向蓝天的恐龙·纳米技术就在身边·千年梦圆在今朝
unit_type regular
created_at 2026-06-18 03:48:56
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