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 United States 30 32.3%
2 China 29 31.2%
3 Netherlands 14 15.1%
4 Russia 8 8.6%
5 Germany 6 6.5%
6 Taiwan 3 3.2%
7 Australia 1 1.1%
8 Hong Kong 1 1.1%
9 Czech Republic 1 1.1%