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 229 63.3%
2 United States 72 19.9%
3 Germany 40 11%
4 Canada 11 3%
5 Taiwan 3 0.8%
6 Lao People's Democratic Republic 2 0.6%
7 Singapore 2 0.6%
8 Switzerland 2 0.6%
9 France 1 0.3%