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The advantage of OVO is that when there are many categories, the training time is less than OVR. The disadvantage is that there are many classifiers.板栗等人吃惊地长大了嘴：谁会讨厌自个的娘哩。It is very important to solve the problem of waste packaging and promote green express delivery. On the one hand, at the source, it is necessary to formulate industry standards and packaging material standards to promote more environmentally friendly packaging materials; On the other hand, it is also necessary to strengthen recycling at terminals. For a single individual, the discarded express packages may be dozens of woven bags and packing boxes, but when the whole society comes together, the number of discarded woven bags and packing boxes can reach an astonishing billions in a year. If every individual covets convenience and labor, discarding it and throwing it away at random, it will not only cause waste of resources, but also bring pressure to subsequent garbage disposal and even cause environmental pollution. It seems that the society pays the bill, but in the end it is everyone living in this society. Green life requires us to practice it together.陈启一边看着，一边说道。他需要沛公的为外援，那就如他所愿。四名最搞笑、最爱讲荤素笑料的哥伦比亚喜剧演员为隔离后渴望听他们讲故事的观众奉上精彩的表演。