A smooth sea never made a skilled sailor.
平静的海面从未造就过熟练的水手。
The most prominent single element in modern scientific management is the task idea. The work of every workman is fully planned out by the management at least one day in advance, and each man receives in most cases complete written instructions, describing in detail the task which he is to accomplish.
数学的美在于它是一种可以以其他任何方式都无法描述宇宙的语言。