Underground railroad
地下铁道
🧩 词语组成解析
🗣️ 情景例句
I don't like to sponge.
我不想老蹭别人的东西。
John has extracurricular activities. He's on the football team.
约翰有课外活动。 他参加了足球队。
After I had sat down, he said that business was very bad.
待我坐下后，他说生意非常不景气。