Ostrom
abbr. Office of Overseas Scientific and Technical Research 海外科学技术研究处
🗣️ 情景例句
As a matter of fact,
事实上，
Think all you speak, but speak not all you think.
想想你所说的一切，不要全部说出你所想的。
It seems she was in class on Friday afternoon, but no one has seen her since.
好象她星期五还在教室，但从那以后没人看见过她。