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 251 64.4%
2 United States 51 13.1%
3 Germany 48 12.3%
4 Russia 13 3.3%
5 Taiwan 11 2.8%
6 Malaysia 3 0.8%
7 Canada 3 0.8%
8 Singapore 2 0.5%
9 Switzerland 2 0.5%
10 Hong Kong 2 0.5%
11 Italy 2 0.5%
12 Lao People's Democratic Republic 1 0.3%
13 Brazil 1 0.3%