city-wall brick

例句：

1. 1. The city wallwas built over 1000years ago.
   这座城墙建于1000多年前。
2. 2. The ancient city walls arestill standing today.
   古老的城墙至今仍然屹立不倒。
3. 3. The bricks were laid carefullyto ensure the wall's strength.
   砖块被仔细铺设，以确保城墙的坚固。