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 274 63.1%
2 United States 72 16.6%
3 Germany 36 8.3%
4 Netherlands 17 3.9%
5 Canada 13 3%
6 Russia 7 1.6%
7 United Kingdom 4 0.9%
8 Singapore 2 0.5%
9 France 2 0.5%
10 Portugal 2 0.5%
11 Indonesia 2 0.5%
12 Australia 1 0.2%
13 Taiwan 1 0.2%
14 Ukraine 1 0.2%