深沟高垒
- na.dig deep ditches and build high forts
深沟高垒深沟高垒
1.dig deep ditches and build high forts; deep trenches and high ramparts -- strong defence; fortify one's position
深沟高垒深沟高垒1.dig deep ditches and build high forts; deep trenches and high ramparts -- strong defence; fortify one's position