They have cleverly adapted a particle accelerator, a van DE Graaf accelerator, to accelerate small dust particles.
他们聪明的改造了一种范德·格拉夫粒子加速器，来加速微小的尘埃颗粒。
Graaf says more than six million people, or about one-quarter of Afghanistan's population, have no access to health services.
Graaf说，超过600万人口，大约四分之一的阿富汗人口不能接受医疗服务。
Graaf says more than six million people, or about one-quarter of Afghanistan's population, have no access to health services.
Graaf说，超过600万人口，大约四分之一的阿富汗人口不能接受医疗服务。
应用推荐