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 440 44.8%
2 United States 209 21.3%
3 Netherlands 157 16%
4 Germany 93 9.5%
5 France 32 3.3%
6 Japan 15 1.5%
7 Canada 15 1.5%
8 United Kingdom 5 0.5%
9 Taiwan 4 0.4%
10 4 0.4%
11 Korea, Republic of 2 0.2%
12 Hong Kong 2 0.2%
13 Russia 2 0.2%
14 India 1 0.1%
15 Brazil 1 0.1%