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 458 44.4%
2 United States 291 28.2%
3 Netherlands 99 9.6%
4 Germany 74 7.2%
5 France 33 3.2%
6 Canada 23 2.2%
7 Hong Kong 12 1.2%
8 Sweden 12 1.2%
9 Korea, Republic of 7 0.7%
10 India 5 0.5%
11 Ukraine 5 0.5%
12 Russia 3 0.3%
13 Taiwan 2 0.2%
14 Romania 2 0.2%
15 Norway 1 0.1%
16 Singapore 1 0.1%
17 Israel 1 0.1%
18 Brazil 1 0.1%
19 United Kingdom 1 0.1%