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 40 54.1%
2 China 18 24.3%
3 France 6 8.1%
4 Singapore 4 5.4%
5 Czech Republic 2 2.7%
6 Germany 1 1.4%
7 Russia 1 1.4%
8 Taiwan 1 1.4%
9 Ukraine 1 1.4%