天堑 (天塹) tiān qiàn

tiān qiàn phrase a natural boundary
Domain: Literary Chinese 文言文
Notes: Such as a river or a pass (Guoyu '天塹'; Mathews 1931 '天塹', p. 128)

Contained in

• 长江天堑(長江天塹) the Yangtze River as a natural boundary

Word is mentioned most frequently in

Truncated for common words

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