BPG致力于知识的发现和传播
Total Visits of This Article
2021 | 总访问次数
排名 国家/地区 数量 占比
1 China 58 40.8%
2 United States 23 16.2%
3 Netherlands 21 14.8%
4 France 17 12%
5 Russia 11 7.7%
6 Germany 7 4.9%
7 Czech Republic 2 1.4%
8 Spain 1 0.7%
9 Switzerland 1 0.7%
10 Portugal 1 0.7%