Scientists say they are a step closer to developing materials that could render people and objects invisible.
科学家声称他们在发明可以使人和物体隐形的材料上取得了进一步的进展。
This toolkit is intended to support you in developing materials and in planning and conducting events, in celebration of the day.
这本工具手册旨在帮助你们准备纪念世界卫生日的材料以及策划和组织纪念活动。
This toolkit is intended to support you in developing materials and in planning and conducting events, in celebration of the day.
这本工具手册旨在帮助你们准备纪念世界卫生日的材料以及策划和组织纪念活动。
应用推荐