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 22 48.9%
2 United States 10 22.2%
3 Germany 6 13.3%
4 Australia 3 6.7%
5 Netherlands 2 4.4%
6 New Zealand 1 2.2%
7 Lao People's Democratic Republic 1 2.2%