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 151 54.1%
2 United States 84 30.1%
3 Germany 30 10.8%
4 Russia 3 1.1%
5 Switzerland 2 0.7%
6 Hong Kong 2 0.7%
7 Denmark 2 0.7%
8 France 2 0.7%
9 Australia 2 0.7%
10 Canada 1 0.4%