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 United States 50 31.2%
2 China 37 23.1%
3 Germany 30 18.8%
4 Netherlands 14 8.8%
5 Canada 13 8.1%
6 Russia 5 3.1%
7 Ukraine 4 2.5%
8 Portugal 2 1.2%
9 France 2 1.2%
10 Hong Kong 1 0.6%
11 India 1 0.6%
12 Moldova, Republic of 1 0.6%