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 147 58.1%
2 United States 47 18.6%
3 Germany 32 12.6%
4 Canada 13 5.1%
5 Netherlands 3 1.2%
6 Russia 2 0.8%
7 Sweden 2 0.8%
8 Hong Kong 2 0.8%
9 Malaysia 2 0.8%
10 France 2 0.8%
11 Costa Rica 1 0.4%