—— 请按键盘 空白键 开始游戏 ——

Traceability in seafood isn't just good ethics, it's good business.
有两种方式可以扩展业务。评估你擅长什么,并从你的技能出发进行扩展。或者确定你的客户需要什么,然后反向工作,即使这需要学习新的技能。
Mathematics is not a deductive science—that's a cliché. When you try to prove a theorem, you don't just list the hypotheses and then start to reason. What you do is trial and error, experimentation, guesswork.