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 195 66.6%
2 United States 42 14.3%
3 Germany 33 11.3%
4 Netherlands 6 2%
5 Taiwan 6 2%
6 Russia 3 1%
7 Singapore 2 0.7%
8 Morocco 2 0.7%
9 Denmark 2 0.7%
10 France 1 0.3%
11 Czech Republic 1 0.3%