这片土地的地势非常平坦。

Zhè piàn tǔdì de dìshì fēicháng píngtǎn.

The topography of this land is very flat.

山区的地势多变，需要注意安全。

Shānqū de dìshì duōbiàn, xūyào zhùyì ānquán.

The topography in mountainous areas is changeable, so safety precautions are necessary.

我们需要了解战场的地势情况。

Wǒmen xūyào liǎojiě zhànchǎng de dìshì qíngkuàng.

We need to understand the topography of the battlefield.