Lemniscate
n. [数]双纽线
🗣️ 情景例句
Have you ever been to Nanjing?
你曾去过南京吗？
Bread is the staff of life.
民以食为天。
Sally was very excited because she had never travelled on a train before.
萨莉非常激动，因为她从未乘过火车。