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 201 42.2%
2 United States 190 39.9%
3 Germany 34 7.1%
4 Netherlands 20 4.2%
5 Canada 18 3.8%
6 Hong Kong 3 0.6%
7 Hungary 2 0.4%
8 Korea, Republic of 2 0.4%
9 Singapore 2 0.4%
10 Switzerland 1 0.2%
11 Russia 1 0.2%
12 France 1 0.2%
13 Japan 1 0.2%