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 53 47.3%
2 United States 22 19.6%
3 Netherlands 18 16.1%
4 Germany 6 5.4%
5 Singapore 3 2.7%
6 Taiwan 3 2.7%
7 France 3 2.7%
8 Russia 2 1.8%
9 Korea, Republic of 1 0.9%
10 Czech Republic 1 0.9%