BPG致力于知识的发现和传播
Total Visits of This Article
2020 | 总访问次数
排名 国家/地区 数量 占比
1 China 84 46.2%
2 United States 41 22.5%
3 Germany 32 17.6%
4 Italy 7 3.8%
5 Russia 6 3.3%
6 South Africa 4 2.2%
7 France 3 1.6%
8 Netherlands 2 1.1%
9 United Kingdom 2 1.1%
10 Canada 1 0.5%