People who work in the space business like to keep the motto per aspera ad astra close to their hearts.It means “through hardship to the stars”.It was never intended to be a bureaucrats' charter. 航天领域工作的人们内心笃信传承至今的箴言”十年磨一剑”但这并不应该成为官僚们设置障碍的借口.
per aspera ad astra 历经艰难终成大业
I come in answer to your ad for a salesman. 我来应聘售货员的职位。
We were told to help ourselves to the food ad lib. 这些食物让我们随便吃。
Problems were solved on an ad hoc basis. 做了一些变通问题便解决了。