不幸而又值得期待的事情是，你的人生是不會(huì)有必修課程的，全部都是選修。
As to the gods, I have no means of knowing either that they exist or that they do not exist. For many are the obstacles that impede knowledge, both the obscurity of the question and the shortness of human life.
Sustainability is the future of aquaculture, and we must invest in eco-friendly technologies.