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 233 64.9%
2 United States 52 14.5%
3 Germany 38 10.6%
4 Canada 21 5.8%
5 Netherlands 3 0.8%
6 Russia 3 0.8%
7 Hong Kong 2 0.6%
8 Taiwan 2 0.6%
9 United Kingdom 2 0.6%
10 Moldova, Republic of 1 0.3%
11 Singapore 1 0.3%
12 Chile 1 0.3%