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 71 43.8%
2 United States 26 16%
3 Netherlands 22 13.6%
4 Germany 16 9.9%
5 Russia 8 4.9%
6 France 4 2.5%
7 India 3 1.9%
8 Czech Republic 2 1.2%
9 Australia 2 1.2%
10 Canada 2 1.2%
11 South Africa 2 1.2%
12 New Zealand 2 1.2%
13 Ukraine 1 0.6%
14 Hong Kong 1 0.6%