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 197 48.6%
2 United States 133 32.8%
3 Germany 39 9.6%
4 Canada 15 3.7%
5 Netherlands 7 1.7%
6 Korea, Republic of 5 1.2%
7 Russia 2 0.5%
8 Singapore 2 0.5%
9 Sweden 2 0.5%
10 United Kingdom 1 0.2%
11 Australia 1 0.2%
12 India 1 0.2%