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 184 59%
2 United States 40 12.8%
3 Germany 36 11.5%
4 Netherlands 25 8%
5 Korea, Republic of 10 3.2%
6 Russia 9 2.9%
7 France 3 1%
8 Hong Kong 2 0.6%
9 Sweden 2 0.6%
10 Moldova, Republic of 1 0.3%