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 167 66.3%
2 Germany 38 15.1%
3 United States 31 12.3%
4 Russia 3 1.2%
5 Turkey 3 1.2%
6 Singapore 2 0.8%
7 Korea, Republic of 2 0.8%
8 Romania 2 0.8%
9 Belgium 2 0.8%
10 France 1 0.4%
11 United Kingdom 1 0.4%