Srac
abbr. short-run average-cost 短期平均成本; short-run average-cost curve 短期平均成本曲线
🗣️ 情景例句
Large or Little?
大杯还是小杯？
You'd better go at once, hadn't you?
你最好马上走，不对吗？
They're dangerous!
它们是很危险的！