Stac
abbr. 科技咨询委员会（Science and Technology Advisory Committee）
🗣️ 情景例句
Yeah,
是啊。
He is most noticeable for his southern accent.
他有很浓重的南方口音。
He was very healthy and happy, but he could not look after himself.
他很健康，非常欢快。但不能照料自己。