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 408 48.6%
2 United States 199 23.7%
3 Netherlands 132 15.7%
4 Germany 57 6.8%
5 Canada 16 1.9%
6 France 5 0.6%
7 India 4 0.5%
8 Russia 4 0.5%
9 Singapore 2 0.2%
10 Poland 2 0.2%
11 Romania 2 0.2%
12 Hong Kong 2 0.2%
13 Brazil 2 0.2%
14 Korea, Republic of 1 0.1%
15 Malaysia 1 0.1%
16 Norway 1 0.1%
17 Ukraine 1 0.1%
18 United Kingdom 1 0.1%