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 United States 55 39%
2 China 44 31.2%
3 Netherlands 16 11.3%
4 Germany 10 7.1%
5 Korea, Republic of 6 4.3%
6 France 3 2.1%
7 Russia 2 1.4%
8 Singapore 1 0.7%
9 Malaysia 1 0.7%
10 Japan 1 0.7%
11 Viet Nam 1 0.7%
12 Canada 1 0.7%