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 454 44%
2 United States 283 27.4%
3 Netherlands 129 12.5%
4 Germany 76 7.4%
5 France 40 3.9%
6 Canada 17 1.6%
7 Hong Kong 9 0.9%
8 Sweden 5 0.5%
9 United Kingdom 4 0.4%
10 Korea, Republic of 3 0.3%
11 Norway 2 0.2%
12 Poland 2 0.2%
13 Russia 2 0.2%
14 Singapore 2 0.2%
15 Spain 1 0.1%
16 1 0.1%
17 Ukraine 1 0.1%