2 sentences for 地道 (dì​dào — tunnel)

1. 越共在丛林中利用地道作战。

   Yuè​gòng zài cóng​lín zhōng lì​yòng dì​dào zuò​zhàn.

   The Viet Cong used tunnels to fight in the jungle.

   Source: Dong Chinese Dictionary

2. 战士们在村子下面挖了许多地道来防御进攻。

   zhàn​shì men zài cūn​zi xià​miàn wā le xǔ​duō dì​dào lái fáng​yù jìn​gōng.

   The soldiers dug many tunnels under the village to defend against attacks.

   Source: Dong Chinese Dictionary