the quality of being level or smooth 平整度: 水平或光滑的质量the immense flatness of the plain 广阔平坦的平原 an instrument for measuring floor flatness 测量地板平整度的仪器
the fact of not showing or feeling interest, enthusiasm or emotion 扁平: 没有表现出或没有兴趣,热情或情感feelings of flatness and disappointment 平淡和失望的感觉
the fact of business not being very successful because very little is being sold 不景气的;萧条的;生意清淡的 a sustained state of flatness in the economy 经济的持续平稳状态