Quadrivalency
n. 四价
🗣️ 情景例句
Hi. This si Peter from Dr. Alice's office.
嗨，你好，我是埃里斯诊所的彼得。
The scent of roses is wonderful.
玫瑰的芳香非常棒！
People travelling long distances frequently have to decide whether they would prefer to go by land, sea, or air.
出远门的人常常需要决定是走旱路、水路，还是坐飞机。