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 32 32.3%
2 China 27 27.3%
3 Netherlands 15 15.2%
4 Russia 11 11.1%
5 Germany 5 5.1%
6 Taiwan 3 3%
7 Australia 2 2%
8 Switzerland 2 2%
9 Portugal 1 1%
10 Czech Republic 1 1%