坚硬

zhè lǐ de tǔ zhì jiān yìng

这里的土质坚硬。

The soil here is hard.

wū guī yǒu jiān yìng de guī ké

乌龟有坚硬的龟壳。

Tortoises have very hard shells.

wǒ shuāi dǎo zài jiān yìng de shí dì shang

我摔倒在坚硬的石地上。

I fell onto the hard stone floor.

jiān yìng de shí tou

坚硬的石头

solid rock