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 153 57.1%
2 United States 71 26.5%
3 Germany 19 7.1%
4 Netherlands 8 3%
5 France 7 2.6%
6 Russia 3 1.1%
7 Singapore 3 1.1%
8 Korea, Republic of 2 0.7%
9 Togo 1 0.4%
10 Poland 1 0.4%