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 232 58.9%
2 United States 69 17.5%
3 Netherlands 32 8.1%
4 Germany 31 7.9%
5 Canada 18 4.6%
6 Romania 2 0.5%
7 Hong Kong 2 0.5%
8 Hungary 2 0.5%
9 France 2 0.5%
10 Norway 1 0.3%
11 Korea, Republic of 1 0.3%
12 Moldova, Republic of 1 0.3%
13 Russia 1 0.3%