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 200 42.2%
2 China 199 42%
3 Germany 42 8.9%
4 Russia 8 1.7%
5 Japan 5 1.1%
6 Canada 3 0.6%
7 Taiwan 3 0.6%
8 Tunisia 2 0.4%
9 Switzerland 2 0.4%
10 Australia 2 0.4%
11 France 2 0.4%
12 Netherlands 2 0.4%
13 Hong Kong 1 0.2%
14 India 1 0.2%
15 Ukraine 1 0.2%
16 Singapore 1 0.2%