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 244 62.2%
2 United States 52 13.3%
3 Germany 48 12.2%
4 Taiwan 18 4.6%
5 Russia 9 2.3%
6 Hong Kong 3 0.8%
7 Korea, Republic of 3 0.8%
8 Latvia 2 0.5%
9 Czech Republic 2 0.5%
10 Denmark 2 0.5%
11 Australia 2 0.5%
12 Singapore 2 0.5%
13 Thailand 2 0.5%
14 United Kingdom 2 0.5%
15 Brazil 1 0.3%