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 40 40%
2 United States 22 22%
3 Netherlands 14 14%
4 Canada 8 8%
5 France 4 4%
6 Germany 4 4%
7 New Zealand 2 2%
8 Russia 2 2%
9 Singapore 2 2%
10 Bulgaria 1 1%
11 Czech Republic 1 1%