深溝高壘

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See also: 深沟高垒

Chinese

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trad. (深溝高壘) 深溝 高壘
simp. (深沟高垒) 深沟 高垒
Literally: “deep trenches, high defensive walls”.

Pronunciation

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Idiom

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深溝高壘

  1. to dig deep trenches and build high defensive walls; to fortify one's position; to dig in