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 161 62.4%
2 United States 43 16.7%
3 Germany 31 12%
4 Canada 6 2.3%
5 Russia 4 1.6%
6 Korea, Republic of 3 1.2%
7 Ukraine 3 1.2%
8 Singapore 2 0.8%
9 Japan 2 0.8%
10 Australia 1 0.4%
11 Malaysia 1 0.4%
12 Netherlands 1 0.4%