1. Career: Once youth is gone, career will never be achieved. -browning. The most important thing in work is to improve efficiency. -about Addison. If you want to get the most out of your career, you must first save your energy. -Lu You.

second, life: doing something is the highest realm of life. -Engels. How you think, what kind of life you will have. -Emerson. Struggle is life, and life is only progress. -Ba Jin.

third, about time: time is the site for the development of abilities. -Marx. Books are ships crossing the sea of time. -bacon. Time is generous to those who are stingy with it. -Russian proverb.

4. About friendship: Friendship is a big tree that can provide shade. -Coleridge. Friendship can multiply joy and reduce sorrow. -bacon. Compromise is not a solid foundation for friendship. -Tagore