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 32 37.6%
2 United States 22 25.9%
3 Korea, Republic of 10 11.8%
4 Netherlands 10 11.8%
5 Canada 3 3.5%
6 Belgium 2 2.4%
7 Japan 2 2.4%
8 Taiwan 1 1.2%
9 Czech Republic 1 1.2%
10 France 1 1.2%
11 Germany 1 1.2%