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 United States 51 52%
2 China 20 20.4%
3 Germany 11 11.2%
4 Canada 4 4.1%
5 Taiwan 3 3.1%
6 France 2 2%
7 Japan 2 2%
8 Korea, Republic of 1 1%
9 Malaysia 1 1%
10 Russia 1 1%
11 Sweden 1 1%
12 Czech Republic 1 1%