BPG致力于知识的发现和传播
Total Visits of This Article
2019 | 总访问次数
排名 国家/地区 数量 占比
1 United States 33 42.9%
2 China 22 28.6%
3 France 8 10.4%
4 Germany 5 6.5%
5 Czech Republic 4 5.2%
6 Hong Kong 2 2.6%
7 Russia 1 1.3%
8 Singapore 1 1.3%
9 United Kingdom 1 1.3%