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 51 36.7%
2 China 47 33.8%
3 Germany 11 7.9%
4 Netherlands 11 7.9%
5 Canada 5 3.6%
6 Hong Kong 3 2.2%
7 Russia 3 2.2%
8 Korea, Republic of 2 1.4%
9 Australia 2 1.4%
10 France 1 0.7%
11 Malaysia 1 0.7%
12 Japan 1 0.7%
13 Ukraine 1 0.7%