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 91 41.2%
2 United States 64 29%
3 Netherlands 19 8.6%
4 Russia 13 5.9%
5 Germany 12 5.4%
6 Korea, Republic of 9 4.1%
7 France 7 3.2%
8 Philippines 3 1.4%
9 Norway 2 0.9%
10 Hong Kong 1 0.5%