Bluebook
n. 蓝皮书（美国二手市场设备价格手册）
🗣️ 情景例句
Great Thanksgiving.
美好的感恩节。
I asked him to do it for me, but he wouldn't.
我请他帮我做，但是他不肯。
Your English is incredibble.
我真不敢相信你的英语。