When a complex system starts to decay, the first signs are usually subtle. In the third century, after the Roman empire had reached its geographic maximum, literacy began to decline across Roman society. Education levels fell not only among soldiers, but among officers, aristocrats, and even emperors. The Roman army still looked formidable for years afterward. It had good equipment and could march well. Yet it was no longer as advanced relative to Rome’s enemies as it had once been. It fought as hard as ever, but less effectively.
声明还说，与会部长重申维护地区空域安全、海上航线和航行自由（包括霍尔木兹海峡和曼德海峡）的重要性，同时强调维护供应链安全和全球能源市场稳定的重要性。（央视新闻），这一点在体育直播中也有详细论述
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Most upland farmers still keep sheep on their land