When he concentrate on overlaying, he only notice if each brick is on its right place and if concrete is enough or not, and if surplus concrete comes out of cleft of bricks.

• 当他在专心累砖时，他心中只专注在每一块砖摆放的位置是否正确，水泥铺的是够，还是不够，有没有多余的水泥自砖缝中渗出等等。