Bluebook
n. 藍皮書（美國二手市場設備價格手冊）
??? 情景例句
I guess you're right.
我想你說得對。
A friend is never known till a man have need.
不到患難時，永遠不能認識真正的朋友。
I' d like to study medicine and become a doctor.
我想學醫，當個醫生。