Sca
abbr. 美国科学俱乐部联合会（Science Clubs of America）
🗣️ 情景例句
Too noisy to study.
太吵了书看不下去。
It was after dark when we got back,and we were all tired.
我们回来时天已经黑了，并且我们都很疲倦。
Do you still want them?'
您是否还要呢？”