GalleryBIEA 2020 STEM论坛 BIEA(2019)国际青少年科创大赛 BIEA 2019 STEM论坛 BIEA主席团访华 BIEA董事会议 BIEA照片墙 BIEA study tour 2019 BIEA Drone Design Competition 2018 BIEA Study Tour 2018
