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 392 52%
2 United States 140 18.6%
3 Netherlands 109 14.5%
4 Germany 58 7.7%
5 Canada 17 2.3%
6 Taiwan 6 0.8%
7 France 4 0.5%
8 Ukraine 3 0.4%
9 United Kingdom 3 0.4%
10 India 3 0.4%
11 Korea, Republic of 2 0.3%
12 Hong Kong 2 0.3%
13 Poland 2 0.3%
14 2 0.3%
15 Australia 2 0.3%
16 Czech Republic 2 0.3%
17 Egypt 2 0.3%
18 Viet Nam 2 0.3%
19 Finland 1 0.1%
20 Singapore 1 0.1%
21 Moldova, Republic of 1 0.1%