When making something， always get a few extras — extra material， extra parts， extra space， extra finishes. The extras serve as backups for mistakes， reduce stress， and fill your inventory for the future. They are the cheapest insurance.

开玩笑是件严肃的事情。

Safety is the lifeline of the petroleum industry; it must never be neglected.

释义：运气不好的时候，即使是黄金也会失去光泽；运气好的时候，连普通的铁也会发光。