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 250 55.7%
2 United States 124 27.6%
3 Germany 32 7.1%
4 Canada 22 4.9%
5 Ukraine 4 0.9%
6 Hong Kong 4 0.9%
7 Netherlands 2 0.4%
8 Singapore 2 0.4%
9 Sweden 2 0.4%
10 Chile 2 0.4%
11 Brazil 2 0.4%
12 United Kingdom 1 0.2%
13 Taiwan 1 0.2%
14 Mauritius 1 0.2%