礌石
lèi shí
(old) stones that can be rolled down onto an attacking enemy
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石墙
shí qiáng
Stone wall
石匠用石头建造房屋。
shí jiàng yòng shí tou jiàn zào fáng wū。
Masons build houses out of stone.
孩子们喜欢收集石头
hái zi men xǐ huan shōu jí shí tou
Children love collecting rocks
他们用石头建造了这座房子
tā men yòng shí tou jiàn zào le zhè zuò fáng zi
They built this house with stones