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 150 52.1%
2 United States 93 32.3%
3 Germany 20 6.9%
4 Korea, Republic of 10 3.5%
5 Netherlands 8 2.8%
6 United Kingdom 2 0.7%
7 India 2 0.7%
8 Moldova, Republic of 1 0.3%
9 Russia 1 0.3%
10 Singapore 1 0.3%