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1·Answer: Agree to change the cement floor to quadrel.

答：同意将水泥地面改为方砖。

2·Under the condition of artificial feeding, effect of using cement quadrel to collect eggs was good.

在人工饲养条件下，利用水泥方砖采卵效果良好。

3·The top of circumvallation was paved by quadrel , which looks like a wild street, five to six horses can be ridden abreast along it.

城墙顶上铺着方砖，十分平整，像很宽的马路，五六匹马可以并行。

方砖

1·The top of circumvallation was paved by quadrel , which looks like a wild street, five to six horses can be ridden abreast along it.

城墙顶上铺着方砖，十分平整，像很宽的马路，五六匹马可以并行。