BPG致力于知识的发现和传播
Total Visits of This Article
2020 | 总访问次数
排名 国家/地区 数量 占比
1 China 43 43%
2 United States 25 25%
3 10 10%
4 Germany 8 8%
5 Taiwan 4 4%
6 Korea, Republic of 2 2%
7 Hong Kong 2 2%
8 Ireland 1 1%
9 Czech Republic 1 1%
10 France 1 1%
11 Portugal 1 1%
12 Russia 1 1%
13 United Kingdom 1 1%