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 72 45.9%
2 United States 34 21.7%
3 Netherlands 16 10.2%
4 France 10 6.4%
5 Germany 7 4.5%
6 Korea, Republic of 6 3.8%
7 Russia 4 2.5%
8 Hong Kong 3 1.9%
9 2 1.3%
10 Australia 2 1.3%
11 Singapore 1 0.6%