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 211 47.2%
2 United States 167 37.4%
3 Germany 31 6.9%
4 Taiwan 7 1.6%
5 Netherlands 5 1.1%
6 France 4 0.9%
7 Hong Kong 3 0.7%
8 Israel 3 0.7%
9 Russia 3 0.7%
10 Singapore 3 0.7%
11 Romania 2 0.4%
12 Korea, Republic of 2 0.4%
13 Macao 2 0.4%
14 Bulgaria 2 0.4%
15 Azerbaijan 1 0.2%
16 Japan 1 0.2%