Sca
abbr. 美国科学俱乐部联合会（Science Clubs of America）
🗣️ 情景例句
John is tied up at the present time.
John现在有事。
He feels resentment at the interruption.
他因被人打断而恼怒不已。
In Miss Gao's class there are forty-six students.
在高老师的班上有四十六个学生。