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 542 53.5%
2 United States 195 19.2%
3 Netherlands 102 10.1%
4 France 70 6.9%
5 Germany 48 4.7%
6 Canada 21 2.1%
7 Korea, Republic of 15 1.5%
8 Australia 4 0.4%
9 India 4 0.4%
10 Iran, Islamic Republic of 3 0.3%
11 Singapore 3 0.3%
12 Ukraine 2 0.2%
13 United Kingdom 2 0.2%
14 Hong Kong 2 0.2%
15 Poland 1 0.1%