flatness

n.平坦；平滑；平淡

The flatness of the roads made the rest of their trip more comfortable. 道路的平坦使他们剩下的路程舒服多了。

Then, the effect of the working pressure on the flatness of the wafer surface is investigated. 接著，探讨加工压力的大小对于晶圆表面平坦度的影响。

This distressing feeling is caused by the flatness of life and the lack of passion.However, it cannot be simply explained by human nature of insatiability. 对人类这这种因生命的平淡和缺少激情而苦恼和心态，有时是不能用不知足来解释的。