Within all the lands reaching the sea, none failed to respond.
Tips
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薄海 is purely literary — in classical usage 薄 (bó) means 'to reach / extend to'. The phrase 薄海同欢 ('the whole nation rejoices together') survives in formal speeches and editorials.
mistakes
Don't read the 薄 here as báo (thin) — in this set phrase it's bó, with the classical 'reaching to' meaning.