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 48 34.5%
2 United States 40 28.8%
3 Netherlands 22 15.8%
4 Korea, Republic of 9 6.5%
5 Germany 6 4.3%
6 Czech Republic 4 2.9%
7 Canada 4 2.9%
8 Russia 3 2.2%
9 Australia 2 1.4%
10 France 1 0.7%