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 287 50%
2 China 198 34.5%
3 Germany 30 5.2%
4 Canada 30 5.2%
5 Russia 9 1.6%
6 Hong Kong 6 1%
7 Netherlands 4 0.7%
8 Taiwan 4 0.7%
9 Moldova, Republic of 2 0.3%
10 Austria 2 0.3%
11 Brazil 1 0.2%
12 France 1 0.2%