The only good is knowledge and the only evil is ignorance.
家中闲坐无聊,不妨想想,有人在为生活而辛劳;官位不能飞黄腾达,想想仍有许多才能好的读书人,人都老了还是青衣。
Every piece of plastic we produce should have a clear path to being reused or recycled.