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 364 43.2%
2 United States 174 20.6%
3 Netherlands 167 19.8%
4 Germany 82 9.7%
5 Canada 16 1.9%
6 Russia 7 0.8%
7 Taiwan 6 0.7%
8 France 5 0.6%
9 Korea, Republic of 4 0.5%
10 Singapore 4 0.5%
11 Turkey 3 0.4%
12 India 3 0.4%
13 Japan 3 0.4%
14 Australia 2 0.2%
15 Moldova, Republic of 1 0.1%
16 United Kingdom 1 0.1%
17 Serbia 1 0.1%