simplicity
n[U]
1 being easy, plain or straightforward 简单; 朴素; 率直
the simplicity of the problem 该问题的简单性
the simplicity of her style 她风格的朴实
a character marked by franknessand simplicity 爽直的性格.
2 (idm 习语) be sim,plicity it`self be very easy 极为容易
Cleaning the light is simplicity itself; just wipe it with a damp cloth. 把灯弄乾净非常容易, 用湿布一擦就行了.