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 174 56.1%
2 United States 54 17.4%
3 Germany 44 14.2%
4 Canada 15 4.8%
5 South Africa 3 1%
6 Taiwan 3 1%
7 Netherlands 3 1%
8 Portugal 3 1%
9 2 0.6%
10 Sweden 2 0.6%
11 Singapore 2 0.6%
12 Viet Nam 1 0.3%
13 Bolivia, Plurinational State of 1 0.3%
14 France 1 0.3%
15 Romania 1 0.3%
16 Russia 1 0.3%