Never put off the work till tomorrow what you can put lff today.
不要等明天交上差再找借口，今天就要找好。
2
Careers, like rockets, don't always take LFF on schedule. The key is to keep working on the engines.
事业就像火箭并非总是依时升空。关键是始终保持动力。
3
The definition and formula of flexibility of arbitrary rectilinear blocks are introduced and LFF principles are extended to handle arbitrary rectilinear blocks and blocks with relative constraints.