Urachal
脐尿管的
🗣️ 情景例句
when I was about eighteen years old.
那时我差不多十八岁。
I'd like to make an appointment with Professor Smith. Would 9:00 tomorrow be all right?
我想和史密斯教授约个会面时间。明天9点行吗？
We were getting very worried.
我们都非常担心呢。