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 106 54.1%
2 United States 18 9.2%
3 Netherlands 17 8.7%
4 Russia 16 8.2%
5 France 13 6.6%
6 Korea, Republic of 10 5.1%
7 Germany 7 3.6%
8 Japan 2 1%
9 Australia 1 0.5%
10 Norway 1 0.5%
11 Portugal 1 0.5%
12 Ghana 1 0.5%
13 Czech Republic 1 0.5%
14 Sweden 1 0.5%
15 Taiwan 1 0.5%