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 193 73.4%
2 United States 30 11.4%
3 Germany 16 6.1%
4 Taiwan 7 2.7%
5 Malaysia 6 2.3%
6 Singapore 2 0.8%
7 Turkey 2 0.8%
8 Czech Republic 2 0.8%
9 Estonia 2 0.8%
10 Japan 1 0.4%
11 Lithuania 1 0.4%
12 Sweden 1 0.4%