Delete row 51 from textbook_units

id 51
version_id yuwen_bubian_4s
unit_order 7
title 第七单元：古诗三首·为中华之崛起而读书·梅兰芳蓄须·延安我把你追寻
unit_type regular
created_at 2026-06-18 03:48:55
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