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 28 38.4%
2 United States 20 27.4%
3 Netherlands 12 16.4%
4 Czech Republic 4 5.5%
5 France 2 2.7%
6 Canada 2 2.7%
7 Singapore 2 2.7%
8 Russia 1 1.4%
9 Hong Kong 1 1.4%
10 Korea, Republic of 1 1.4%