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 66 39.1%
2 United States 56 33.1%
3 Netherlands 15 8.9%
4 Germany 10 5.9%
5 Canada 8 4.7%
6 Russia 5 3%
7 Singapore 3 1.8%
8 Taiwan 2 1.2%
9 Australia 2 1.2%
10 Czech Republic 1 0.6%
11 Hong Kong 1 0.6%