Ostrom
abbr. Office of Overseas Scientific and Technical Research 海外科学技术研究处
🗣️ 情景例句
I hope he's in a good mood.
我希望他心情不错。
Who rang the bell a while ago?
刚才谁在按门铃？
Historians have long been puzzled by dots, lines and symbols which have been engraved on walls, bones, and the ivory tusks of mammoths.
长期以来，历史学家一直对雕刻在墙壁上、骨头上、古代长毛象的象牙上的点、线和形形色色的符号感到困惑不解。