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 148 56.5%
2 United States 53 20.2%
3 Germany 33 12.6%
4 Canada 12 4.6%
5 Bulgaria 4 1.5%
6 France 3 1.1%
7 Australia 2 0.8%
8 Spain 2 0.8%
9 Netherlands 2 0.8%
10 Romania 1 0.4%
11 Austria 1 0.4%
12 Hong Kong 1 0.4%