地势

这里地势平坦

zhèlǐ dìshì píngtǎn

The terrain is flat here

易守难攻

dìshì xiǎnyào, yì shǒu nán gōng

Easy to defend and difficult to attack

地势低容易积水

dìshì dī róngyì jīshuǐ

Low-lying areas are prone to waterlogging