此外值得一提的是，对洛阳钼业来说，其发展史本身有着浓厚的并购基因。2013年收购刚果（金）TFM铜钴矿，2016年拿下英美资源巴西铌磷资产，2019年完成KFM钴铜矿收购，2020年收购埃珂森（CMOC International）实现全球金属贸易布局。
One challenge is having enough training data. Another is that the training data needs to be free of contamination. For a model trained up till 1900, there needs to be no information from after 1900 that leaks into the data. Some metadata might have that kind of leakage. While it’s not possible to have zero leakage - there’s a shadow of the future on past data because what we store is a function of what we care about - it’s possible to have a very low level of leakage, sufficient for this to be interesting.。关于这个话题，夫子提供了深入分析
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本次的年度征文设题很巧妙，体现了现代科技与传统人力对决的意思。