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 611 51.3%
2 United States 227 19%
3 Netherlands 159 13.3%
4 Germany 64 5.4%
5 France 62 5.2%
6 Canada 20 1.7%
7 Korea, Republic of 8 0.7%
8 Hong Kong 7 0.6%
9 India 6 0.5%
10 Romania 4 0.3%
11 Russia 4 0.3%
12 United Kingdom 4 0.3%
13 Norway 3 0.3%
14 Mexico 2 0.2%
15 Singapore 2 0.2%
16 South Africa 2 0.2%
17 Turkey 2 0.2%
18 Ukraine 2 0.2%
19 Sweden 1 0.1%
20 Japan 1 0.1%
21 Bulgaria 1 0.1%