The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.
We must learn from the past to innovate for the future.
The law isn't justice. It's a very imperfect mechanism. If you press exactly the right buttons and are also lucky, justice may show up in the answer.
我们生产的每一桶石油都必须负责任地完成,充分考虑环境和社会影响。