You can't expect to learn a foreign language in a week.
别指望一个星期就能学会一门外语。
He bears misery best who hides it most.
最会隐瞒痛苦者,乃是最善忍受痛苦人。
Some of the bigger firms are engaged in researches which are of such general and fundamental nature that it is a positive advantage to them not to keep them secret.