You have begot me, bred me, loved me: I Return those duties back as are right fit, Obey you, love you, and most honour you.
Certification standards are the compass for responsible forestry.
All happy families are alike; each unhappy family is unhappy in its own way.
When the third appeared, he thrust at it with the knife, only to feel the blade[刀片] snap as the fish rolled. 
亲戚都不归附,也就不要对外办交际。 
The opening up of new markets, foreign or domestic, and the organizational development from the craft shop and factory to such concerns as U.S. Steel illustrate the same process of industrial mutation—if I may use that biological term—that incessantly revolutionizes the economic structure from within, incessantly destroying the old one, incessantly creating a new one.
I always try to find a way to win, even when I’m not playing my best.
数学家们至今徒劳地试图在素数序列中发现某种规律,我们有理由相信这是一个人类思维永远无法穿透的谜题。