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 403 41%
2 United States 233 23.7%
3 Netherlands 157 16%
4 Germany 93 9.5%
5 France 44 4.5%
6 Sweden 15 1.5%
7 Canada 14 1.4%
8 Russia 6 0.6%
9 Australia 3 0.3%
10 Japan 3 0.3%
11 Korea, Republic of 2 0.2%
12 Hong Kong 2 0.2%
13 India 2 0.2%
14 Singapore 2 0.2%
15 Norway 2 0.2%
16 Ukraine 2 0.2%