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 184 54.4%
2 United States 55 16.3%
3 Germany 37 10.9%
4 Taiwan 17 5%
5 Hong Kong 15 4.4%
6 Netherlands 5 1.5%
7 Japan 4 1.2%
8 Russia 4 1.2%
9 Canada 3 0.9%
10 Australia 2 0.6%
11 Romania 2 0.6%
12 Korea, Republic of 2 0.6%
13 Tanzania, United Republic of 2 0.6%
14 Switzerland 2 0.6%
15 Ukraine 1 0.3%
16 Serbia 1 0.3%
17 Singapore 1 0.3%
18 Macao 1 0.3%